black pool, a hot spring along the shoreline of yellowstone lake in the west thumb geyser basin of yellowstone national paark

yellowstone wilderness wetland west water visible vegetation trees tranquil thumb surrounded surface stunning steam standing spring sparse situated shoreline shore setting scenic rocky rising reservoir reflection range providing present pool picturesque people park paark national mountains left landscape lake hot geyser geothermal features edge distant clear characteristic calm boardwalk bluegreen black basin background