What was the first National Monument in the United States?
The great natural monument presents a magnificent view. The igneous rock's height is approximately 1,500 meters and since 1906 it has been given a title of the first National Monument of the USA. The origin of the monument is still a mystery for scientists, though there are some feasible versions of its formation. The main one is that the rock is a neck (some kind of a "leftover") of an ancient volcano.