Team Disney Building

The June 11 challenge -- which 235 people got -- was the Team Disney (or) Michael D. Eisner building at Walt Disney Studios in Burbank, Calif.

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Underside of the Golden Gate Bridge

The June 12 challenge -- which 70 people got -- was the western underside of the northern approach to the Golden Gate Bridge.

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Zeiss refracting telescope at Griffith Park Observatory

The June 13 challenge -- which 146 people got -- was the Zeiss refracting telescope in the east dome of the Griffith Observatory, in Griffith Park, Los Angeles.

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Bay Bridge spans -- new and old

The June 14 challenge -- which 307 people got right -- was the existing and currently under construction eastern spans of the Oakland-San Francisco Bay Bridge.

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Alcatraz

The June 15 challenge -- which 788 people got right -- was the former federal prison (and now, tourist attraction) Alcatraz, located in the San Francisco Bay.

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Mount Tamalpais

The June 16 challenge -- which 21 people got right -- was the Gravity Car Barn (part of the old Mount Tamalpais & Muir Woods Railway) near the East Peak (and the fire lookout at the top of the East Peak) of Mount Tamalpais in Marin County, Calif.

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DC-8 at the California Science Center

The June 17 challenge -- which 78 people got right -- was a United Airlines DC-8, located outside the California Science Center at Exposition Park in Los Angeles.

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Thunderdome

The June 18 challenge -- which 62 people got right -- was Death Guild's Thunderdome at Burning Man in the Black Rock Desert of Nevada.

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Pigeon Point Lighthouse

The June 19 challenge -- which 208 people got -- was the Pigeon Point Lighthouse and Hostel, in Pescadero, Calif.

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Moss Landing

The June 20 challenge -- which 112 people got right -- was the Moss Landing Power Plant in Moss Landing, Calif.

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The Caboose in Monterey

The June 21 challenge -- which 82 people got right -- was the The Caboose (Books, Bears, and Railroad Wares) in Cannery Row, Monterey, Calif.

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Monterey Bay Aquarium

The June 22 challenge -- which 220 people got -- was the Monterey Bay Aquarium, in Monterey, Calif.

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Pillar Point Air Force Station

The June 23 challenge -- which 57 people got right -- was the Pillar Point Air Force Station, in Half Moon Bay, Calif.

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Hearst Castle airfield

The June 24 challenge -- which 27 people got right -- was the view from the road leading to Hearst Castle, in San Simeon, Calif., with Hearst's old private airfield visible in the background.

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Rubber ducks in Cambria, Calif.

The June 25 challenge -- which 94 people got right -- was Keenan's Cambria Village Pharmacy, in Cambria, Calif.

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Bixby Creek Bridge

The June 26 challenge -- which 196 people got right -- was the Bixby Creek Bridge, located in Big Sur, Calif.

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McWay Falls

The June 27 challenge -- which 98 people got right -- was McWay Falls in Julia Pfeiffer Burns State Park in Big Sur, Calif.

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El Bordello Alexandra

The June 28 challenge -- which 66 people got right -- was the El Bordello Alexandra, a former brothel turned apartment building in Venice, Calif.

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Mount St. Mary's College

The June 29 challenge -- which 27 people got right -- was the Chalon campus of Mount Saint Mary's College in Los Angeles.

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Ballerina Clown

The June 30 challenge -- which 123 people got right -- was artist Jonathan Borofsky's "Ballerina Clown," mounted on the Venice Renaissance Building in Venice, Calif.

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Getty Museum

The July 1 challenge -- which 68 people got right -- was the Museum entrance hall at the J. Paul Getty Center in Los Angeles.

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Rain Rocks Rock Shed

The July 2 challenge -- which 23 people got right -- was the under-construction Rain Rocks Rock Shed, alongside the Pitkins Curve Bridge, in Big Sur, just north of Limekiln State Park.

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Pickford Center

The July 3 challenge -- which 14 people got -- was the Academy of Motion Picture Arts and Sciences' Pickford Center for Motion Picture Study (home of the Academy Film Archive), in Hollywood, Calif.

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Spreckles Sugar Plant

The July 4 challenge -- which 52 people got right -- was the Spreckles Sugar Plant in Brawley, Calif.

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Solana solar power plant

The July 5 challenge -- which 17 people got right -- was Abengoa Solar's Solana solar power plant, a 280-megawatt parabolic trough plant currently under construction in Gila Bend, Ariz., that may end up as the world's largest such facility.

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Kitt Peak

The July 6 challenge -- which 152 people got right -- was Kitt Peak National Observatory, near Tucson, Ariz.

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Old Trails Arch Bridge

The July 7 challenge -- which 53 people got right -- was the Old Trails Arch Bridge, as well as other pipeline bridges that span the Colorado River (and the border between Arizona and California) between Needles, Calif., and Topock, Ariz.

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London Bridge

The July 8 challenge -- which 184 people got right -- was London Bridge, in Lake Havasu City, Ariz.

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L.A. Coca-Cola bottling plant

The July 9 challenge -- which 133 people got right -- was the Coca-Cola bottling plant in Los Angeles.

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Hearst Castle one-room schoolhouse

The July 10 challenge -- which 75 people got right -- was the old one-room schoolhouse in San Simeon, Calif., that was once used by children of Hearst Castle ranchhands. Hearst Castle is visible at the top of the hill in the background.

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Piedras Blancas Light Station

The July 11 challenge -- which 120 people got right -- was the Piedras Blancas Light Station, north of San Simeon, Calif.

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Dynergy's Morro Bay Energy Facility

The July 12 challenge -- which 120 people got right -- was Dynegy's Morro Bay Energy Facility, in Morro Bay, Calif.

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Hollywood Reservoir

The July 13 challenge -- which 60 people got right -- was the Hollywood Reservoir, also known as Lake Hollywood, and the Mullholland Dam, in the Hollywood Hills of Los Angeles.

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Space Age Lodge and Restaurant

The July 14 challenge -- which 53 people got right -- was the Space Age Lodge and Restaurant, in Gila Bend, Ariz.

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Broken Hill

The July 15 challenge -- which 25 people got right -- was Broken Hill, at Torrey Pines State Natural Reserve in San Diego.

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Ramon C. Cortines School of Visual and Performing Arts

The July 16 challenge -- which 79 people got right -- is the Ramon C. Cortines School of Visual and Performing Arts, formerly known as Central Los Angeles Area New High School No. 9, in Los Angeles.

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Fallen Star

The July 17 challenge -- which 140 people got right -- was artist Do Ho Suh's "Fallen Star," a small Rhode Island-style cottage hanging off the top of the Jacobs Engineering Building at the University of California at San Diego.

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Lake Mead

The July 18 challenge -- which 194 people got right -- was Hemenway Harbor at Lake Mead in Nevada.

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Del Mar Racetrack

The July 19 challenge -- which 83 people got right -- was the Del Mark Racetrack, in Del Mar, Calif.

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Chateau Marmont

The July 20 challenge -- which 57 people got right -- was the Chateau Marmont, in West Hollywood, Calif.

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Kites at The Crystals

The July 21 challenge -- which 24 people got right -- was a set of hanging kites decorating The Crystals, or Crystals at CityCenter, in Las Vegas, Nev.

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Hoover Dam Bypass Bridge

The July 22 challenge -- which 137 people got right -- was the Mike O'Callaghan-Pat Tillman Memorial Bridge (also known as the Hoover Dam Bypass Bridge) on U.S. Route 93 near Boulder City, Nev.

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Owens Valley Radio Observatory

The July 23 challenge -- which 75 people got right -- was part of Caltech's Owens Valley Radio Observatory, located outside of Big Pine, Calif.

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Railtown 1897

The July 24 challenge -- which nine people got right -- was the Railtown 1897 State Historic Park, in Jamestown, Calif.

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Tim Hawkinson's Bear

The July 25 challenge -- which 161 people got right -- was artist Tim Hawkinson's sculpture, "Bear," located on the campus of the University of California at San Diego.

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Venice Beach Handball Courts

The July 26 challenge -- which 138 people got right -- was the Venice Beach Handball Courts, in Venice, Calif.

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Yosemite tunnel

The July 27 challenge -- which 91 people got right -- was a tunnel on Big Oak Flat Road in Yosemite National Park.

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Coronado Bridge

The July 28 challenge -- which 138 people got right -- is the San Diego-Coronado Bridge, connecting San Diego and Coronado, Calif.

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San Diego Mormon Temple

The July 29 challenge -- which 358 people got right -- was the Mormon Temple in San Diego, Calif.

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Geisel Library at UCSD

The July 30 challenge -- which 151 people got right -- was the Geisel Library (named for Dr. Seuss, aka Theodor Geisel) at the University of California at San Diego, in La Jolla, Calif.

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San Onofre Nuclear Generating Station

The July 31 challenge -- which 233 people got right -- was the San Onofre Nuclear Generating Station in Pendleton, Calif.

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Mark Twain cabin

The August 1 challenge -- which 58 people got right -- was the Mark Twain Cabin, a replica of the cabin in which the author worked on "The Jumping Frog of Calaveras County," on Jackass Hill near Tuttletown, Calif.

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The Green Church

The August 2 challenge -- which 21 people got right -- was the "Green Church," located at the intersection of U.S. Highway 395 and Benton Crossing Road, near Mammoth Lakes, Calif.

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Historic Railroad Tunnel Trail

The August 3 challenge -- which 71 people got right -- was the Historic Railroad Tunnel Trail at the Lake Mead National Recreation Area near Boulder City, Nev., and Hoover Dam.

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Frog statue

The August 4 challenge -- which 62 people got right -- was the Frog statue in Angels Camp, Calif., the locale of Mark Twain's short story "The Celebrated Jumping Frog of Calaveras County."

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Frank Gehry's Venice Treehouse

The August 5 challenge -- which 39 people got right -- was "Treehouse," by architect Frank Gehry, in Venice, Calif.

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Cirque du Soleil's Iris

The August 6 challenge -- which three people got right -- was a backdrop in the Cirque du Soleil show, "Iris," located in Los Angeles, Calif.

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Immaculate Conception Church

The August 7 challenge -- which 52 people got right -- was the Immaculate Conception Church, in Ajo, Ariz.

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Morro Rock

The August 8 challenge -- which 167 people got right -- was Morro Rock, in Morro Bay, Calif.

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Mitt Romney's La Jolla house

The August 9 challenge -- which 11 people got right -- was presumptive Republican party presidential nominee Mitt Romney's house in La Jolla, Calif.

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Boron Air Force Station

The August 10 challenge -- which 33 people got right -- was the former Boron Air Force Station, north of Kramer Junction, Calif.

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Walt Disney Concert Hall

The August 11 challenge -- which 154 people got right -- was the Walt Disney Concert Hall, in Los Angeles, Calif.

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Walt Disney Studios

The August 12 challenge -- which 45 people got right -- was Walt Disney Studios and Walt Disney Animation, in Burbank, Calif.

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