Explore Yellowstone National Park and more!

Obsidian Cliff is a unique feature at Yellowstone, it is an exposed area where thick rhyolite lava flow erupted about 180,000 years ago. Obsidian is a dark volcanic glass.   Source: http://pubs.usgs.gov/fs/2005/3024/

Obsidian Cliff is the result of thick, rhyolite lava flows from the last caldera eruption years ago. Image credit: USGS/S.

Union Falls, Yellowstone Nat'l Park

Union Falls, Yellowstone National Park, Going here in a couple of weeks :)

Bald Eagle in the snow at Yellowstone Park, Wyoming, USA, photograph by Charles Glatzer @shootthelight.com

Bald Eagle in the snow Yellowstone Park, Wyoming, USA, photograph by Charles Glatzer

Lower Falls of the Yellowstone River, Yellowstone National Park, Wyoming

Lower Falls of the Yellowstone River, Yellowstone National Park, Wyoming

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