Devil's Tower, Wyoming

As the legend goes, seven native girls were picking berries in the forest when they came across a bear. As the bear chased them, the girls ran up onto a rock. They prayed to the spirits to save them, and their pleas were heard. The spirits made the rock grow higher and higher. The bear was angry at losing his prey and tried to climb up the rock, digging his claws into the sides and making grooves, but he could not reach the girls. The girls, now safe from the bear, had another problem, as they could not get down from the rock. The spirits took them into the sky where they became the cluster of stars known as the seven sisters.

As geologists tell it, this formation is all that remains of a volcano after millions of years of erosion.

Which explanation do you like better?

Or, you could just go with the movie version where it was the landing spot for the alien ship in Close Encounters of the Third Kind.

An amazing sight, regardless of your version of history!