These are the famous Royal Baths and well worth the visit.
Yes that is steam rising from the hot spring water as it enters the King's Bath and yes it is hot although you are not supposed to we couldn't resist putting our hands in a rill. It certainly dried my hand noticeably I guess from all the chemicals in the spring water.
The King's Bath
An arched overflow part of the Roman engineering arrangements.
From the brochure.
'The water we see today fell on the Mendip Hills many hundreds or even thousands of years ago. It percolates down through limestone aquifers to a depth of between 2700 and 4300 metres where natural heat raises the temperature to between 64 and 96 degrees C. Under pressure the heated water rises to the surface along fissures and faults through the limestone beneath Bath.'
Bath is a beautiful town with so much to see, the Architecture is so well preserved keeping the character of the town.
For those Jane Austin fans there is also a Jane Austin museum which we enjoyed visiting.