Stock Photo - Devil´s Postpile National Monument, near Mammoth Lakes, California, is a formation of columnar basalt lava that settled into hexagonal and similar shapes during cooling.

Stock Photo: Devil's Postpile National Monument, near Mammoth Lakes, California, is a formation of columnar basalt lava that settled into hexagonal and similar shapes during.

Searchable keywords

Choose multiple keywords

More from this author

View Images & Videos by SuperStock