Update (Tuesday, 7:21 p.m.): The answer to today's Picture of the Day challenge is Grand Coulee Dam, in Grand Coulee, Washington. And unlike yesterday, just about everyone knew the answer today. I got 40 correct answers. If you weren't the winner, please come back again tomorrow.
If you like to travel around the United States as I do, you've no doubt come across many of the country's amazing manmade wonders. And Tuesday's Picture of the Day is a great example of what humans can do when they put their minds to it.
Perhaps, then, you've been to visit this amazing piece of workmanship. Or maybe you recognize it from other pictures. Either way, if you know what it is, and where it's located, I'd love to hear from you.
So if you have those answers, please e-mail them to me (at daniel--dot--terdiman--at--cnet--dot--com, including "Picture of the Day" in the subject line). I'll choose a winner at random from among everyone who sends in both pieces of the correct answer. Please forgive me if you don't hear from me if you're not the winner. I get dozens of responses each day.
One caveat: No individual can win more than two prizes. But at the end of the trip, I'll be drawing a name from among all the daily challenge winners and giving out something a little more substantial to that person.
On June 24, Geek Gestalt will kick off Road Trip 2010. After driving more than 18,000 miles in the Rocky Mountains, the Pacific Northwest, the Southwest and the Southeast over the last four years, I'll be looking for the best in technology, science, military, nature, aviation and more throughout the American northeast. If you have a suggestion for someplace to visit, drop me a line. In the meantime, you can follow my preparations for the project on Twitter @GreeterDan and @RoadTrip.