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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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."
