The National Geographic Channel's upcoming Stonehenge Decoded special has spawned an interactive online game that allows viewers to retrace the steps of the ancient builders of Stonehenge. Players must solve brain teaser puzzles that will bring them step-by-step closer to understanding the monument.

Developed by Arkadium, which has also worked with CBS and Fandango, the game debuted today. The show will air on June 1 at 9pm.

National Geographic attracts an audience that is always eager to learn ...