Short answers, pulled from the story.
The water travels through limestone aquifers to a depth of between 100 and 300 meters. Geothermal energy heats this water to a temperature of 46 degrees Celsius before it rises along geological faults.
Romans constructed a temple on the site between 60 and 70 AD during the first few decades of their rule in Britain. Engineers drove oak piles into the mud to create a stable foundation while surrounding the spring with an irregular stone chamber lined with lead.
A young girl swimming in the former Beau Street swimming baths contracted naegleriasis and died in October 1978. Tests confirmed the presence of Naegleria fowleri, a deadly pathogen, in the water following this tragedy.
Anne of Denmark visited Bath twice for her health and bathed in the King's Bath on the 19th of May 1613. The town developed around the site was known as Aquae Sulis, meaning the waters of Sulis.
The site receives more than 1.3 million visitors annually as a major tourist attraction in the UK. Today visitors can tour the baths and museum but cannot enter the water due to the ongoing threat from the pathogen.