Update (Friday, 8:10 p.m. PT): The answer to today's challenge -- which 21 people got right -- is the new Energy Sciences Building at Argonne National Laboratory in Lemont, Ill. Thanks to all who played, and to everyone, please come back for tomorrow's challenge.
Welcome to the Road Trip Picture of the Day contest. This is your chance to win some cool prizes as you test your skills at recognizing pictures.
Each day, I'll be posting a new photograph from my various travels, and your job is to try to correctly identify it using any … Read more