Cheltenham is an historic spa town in England, which started its development in the early 1700s with the discovery of healing waters. It became very popular after the visit of King George III in 1788, and developed further. You cannot take the waters in Cheltenham, but you can visit the Pump Room to get a feeling for the ambience.
Cheltenham is now probably most famous for the Gold Cup horse race which takes place in mid-March every year. You'll need to book early to find a room, possibly as early as the previous year. Many people accept rooms anywhere within about a 50 mi (80 km) radius.