Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, People on boardwalk at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Woman standing on boardwalk looking at Minerva Spring at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Grotto Geyser in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Beauty Pool in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Firehole Spring from Firehole Lake Drive in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Canary Springs, a terrace-like formation created by limestone deposits, at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Beauty Pool in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Canary Springs, a terrace-like formation created by limestone deposits, at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Canary Springs, a terrace-like formation created by limestone deposits, at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Canary Springs, a terrace-like formation created by limestone deposits, at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Canary Springs reflect in the calm waters of a pond at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Canary Springs, a terrace-like formation created by limestone deposits, at Mammoth Hot Springs in Yellowstone Nat'l Park in Wyoming.

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Yellowstone National Park, Mammoth Hot Springs, WY, Wyoming, Mammoth Hot Springs Hotel at sunset in Yellowstone Nat'l Park in Wyoming.