Bath is a city in Somerset county 156 km west of London. It was first established by the Romans in AD 43 as a spa with the Latin name, Aquae Sulis (meaning 'the waters of Sulis' dedicated to the goddess Sulis Minerva) and they built baths around the natural hot springs. During the Georgian era it became popular as a spa town and much later in 1987 it was inscribed as a World Heritage Site which made it a major center for tourism with over 3.8 million visitors each year.
 
            
 
The Roman Baths complex is a well-preserved Roman site for public bathing. The Roman Baths themselves are below the modern street level. It was featured on 'Seven Natural Wonders' TV program in 2005 as one of the wonders of the West Country. The water which bubbles up from the ground at Bath fell as rain on the nearby hills then it seeps down through the limestone to a depth of between 2,700 and 4,300 meters where the energy raises the water temperature to between 64 & 96 °C and the pressure makes the heated water rise to the surface along fissures and faults in the limestone. 

          
 
The complex also houses a museum with artefacts from the Roman period on display including objects which were thrown into the Sacred Spring, presumably as offerings to the goddess Sulis. These include more than 12,000 Roman currency coins which is the largest collective votive deposit known from Britain. A gilt bronze head of the goddess Sulis Minerva, which was discovered nearby in 1727, is also displayed.

           

Also in Bath you can also visit Abbey Church, commonly known as Bath Abbey which was founded in the 7th century and rebuilt in the 16th century. it is one of the largest examples of perpendicular Gothic architecture in the QWest Country. It is an active place of worship and contains monuments to several notable people. 
 
           

So when in London take a day trip to Bath and indulge in it's history.