Baths of Caracalla
The thermae or baths were a social center of Roman life. Used daily as a place to bathe and refresh the body, they also contained swimming pools, parks, stadiums for sports, libraries, lecture rooms, and occasionally small theatres. This is part of the frigidarium, the largest space in the bath and probably unroofed. It is the room for cooling off and swimming. The two other main areas were the calidarium, the hot room, and the tepidarium, the warm room. The baths of Caracalla could accommodate 3,000 bathers.