Southeast of the Salton Sea, Salvation Mountain is a mighty strange sight indeed: a 100ft-high hill of concrete and hand-mixed adobe slathered in colorful paint and found objects (hay bales, tires, telephone poles) and inscribed with religious messages, surrounded by chapel-like grottoes. This work of Leonard Knight (1931–2014) was 28 years in the making and has become one of the great works of American folk art and has even been recognized as a national treasure in the US Senate.

It’s in Niland, about 3 miles off Hwy 111, via Main St/Beal Rd and past train tracks and trailer parks.