No. 2 Grand Canyon, Arizona
Photo Credit: Photographs in the Carol M. Highsmith Archive, Library of Congress, Prints and Photographs Division.
The Grand Canyon is one of the greatest natural monuments in the world and offers a spectacular view over the Colorado River. Aside from just sightseeing, a visitor can take a hiking tour, rafting or if money is not a problem – a helicopter tour to admire the canyon in all its glory.