Devils Postpile National Monument — California.

By: hippie_last (5588.00) Views: 2604 Score: 13 Used: 0 Bookmark: 0 Shares: 22 Downloads: 94

National monument near Mammoth Lakes. Protects columnar basalt formation (up to 60 ft tall, hexagonal columns from cooled lava ~100,000 years ago) and 101-ft Rainbow Falls.
Established 1911. 798 acres.