Devil's Tower is the first national monument of Wyoming and the US. It is 390 m (1,267ft) tall and is a popular rock climbing spot. It was formed by an ancient volcanic eruption - quite similar to the way California's Devil's Postpile was created.
Devil's Tower is the first national monument of Wyoming and the US. It is 390 m (1,267ft) tall and is a popular rock climbing spot. It was formed by an ancient volcanic eruption - quite similar to the way California's Devil's Postpile was created.