Black Pool at West Thumb Is Bright Blue in Color - 9
Brown color
Heat-loving microorganisms inhabit less hot waters near the pool.

Black Pool
Black Pool Pictures - Page 1 2 3 4 5 6 7 8 9

Photo © Vacation Idea.com

Yellowstone Vacation

Yellowstone Lake
West Thumb Geyser Basin
Central Basin
West Thumb Trail
Black Pool
South Entrance
Lewis River
Yellowstone Vacation: Lewis Lake
Yellowstone Vacation: Abyss Pool
Yellowstone Vacation: Big Cone
Fishing Cone
Lakeshore Geyser
Lakeside Spring
Bluebell Pools
Thumb Paint Pots
Moose Falls
Famous Geysers of Yellowstone
Yellowstone Lodging
Yellowstone Vacation Tips
Yellowstone Weather