Lesser-known gems like Bisti-De-Na-Zin in NM and Badlands National Park ... unique palate of greenery that contrasts with the rocky pinnacles popping out of the ground. The park's Echo Canyon ...

Badlands National Park is full of geological oddities, but the 1.5-mile-round-trip Notch Trail is one of the best treks in the South Dakota park. There's something distinctly eerie about the Badlands.