This is a model of how the baths originally looked. The baths today were just one of the circular roofed buildings.
The water is green because of algae being stimulated by the sun light. Water in interior rooms, including this one when the baths were originally built, was clear.
We spent almost 3 hours touring the site. We then strolled along the main street which was full of shops and people towards the Royal Crescent. *** This is actually many small houses right next to each other forming a very large 180 degree building.