Looking for some peace and quiet during your travels this summer? We give you America’s 20 least-visited National Monuments, taken from 2009 National Park Service data. From the thousands of petroglyphs at the El Morro monument in New Mexico to prehistoric caves at Tonto in Arizona, these hidden gems offer scenic views and a journey back in history. Before you visit, research each destination carefully. Some of these parks are remote and may be difficult to access.
America’s 20 least-visited National Monuments – Los Angeles Times