'A Hot Dip', United States, Wyoming, Yellowstone, West Thumb Geyser Basin, Black Pool
Below is an excerpt from my travel blog. Cheers.
Yellowstone sits on a huge caldera, which is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption. Mountains, pine trees, a strong wind, gushing waterfalls and even snow make up Yellowstone. But what sticks out on this huge tract of land in northwestern Wyoming is the geothermal activity found throughout the park. Bright colors, steaming vents, and heated pool gives this park a unique character that you can't find anywhere else in the United States.
Above is the Black Pool, located in West Thumb Geyser Basin. It's one of the brightest geothermal pools I've ever encountered.