A hot spring is a spring that is produced by the emergence of geothermally heated groundwater from the Earth's crust. There are geothermal hot springs all over the Earth. One of the most known emergencies are called Geysers

In this image we can see how infiltrated rain water is heated by the magma located below

Aquae Sulis was the roman name of Bath.

Romans built a temple in the place where there was a hot spring, which become the most important place here.

It was also known as Aquae Calide

The temple was constructed in 60-70 AD and the bathing complex was gradually built up over the next 300 years. ] The Anglo-Saxon Chronicle suggests the original Roman baths were destroyed in the 6th century.

This is the pool where water bubbles up from the ground at Bath

How the hot springs form at Bath

•The water fells as rain on the nearby Mendip Hills.• It percolates down through limestone aquifers to a depth of between 2-4 km where geothermal energy raises the water temperature.• Under pressure, the heated water rises to the surface along fissures and faults • Hot water at a temperature of 46 °C rises here at the rate of 1 million litres every day.