Bathing here seems somehow possible (I did it), but don't stay too much in the water if you're not used to really hot water!
The picture was taken at about 8:30 AM, and the light might have been better a bit later (so it hits the water, not the cave walls). Anyhow, this made the steam more visible.
Nobody came until 9:30. Because of the hot water and some falling rocks, I guess tour operators mostly will not take the risk even though the cave entrance is suprisingly easy and close to the road.