<human>:  Why is the city of Bath, United Kingdom, called Bath?
<bot>: The city of Bath is named after the natural hot springs that are found there. The springs were discovered by the Romans in the 2nd century AD. The Romans built a bathhouse near the springs, and it was used by the rich and famous to relax and get clean. The Romans called the city Aquae Sulis, which means 'the waters of Sul'. The name was changed to Bath in the 12th century, and it is still known today as Bath.