Just about 15 minutes outside of Flagstaff, lies Walnut Canyon. Established as a national monument by Woodrow Wilson in 1915, the park preserves ancient cliff dwellings from the Sinagua Indians.

The park is small; encompassing 3,600 acres and averaging 100,000 annual visitors. And because it only offers two short trails (less than one mile each), exploring can be done in an hour or two.