The Cave Basin is the site of two thermal mineral springs.   This area with its thermal waters has been significant to Indigenous peoples for millennia. In 1883, three railway workers stumbled on the Cave, an event that gave rise to Canada's first national park and eventually to the largest system of protected areas in the world.

Naturally-occurring, warm mineral springs found inside the cave, and outside in an emerald colored basin.  You can see the water that is seeping from the rocks and smell the minerals visible throughout the trail.  They are the lowest of nine sulfurous hot springs on the northeast flank of Sulphur  Mountain.  This beautiful area is beyond description.  Though it is a wild life preserve, no animals were seen on this day.