Verulamium Park Hypocaust
Adjacent to the Verulamium Museum, this park contains the usual—playground, wading pool, lake—and the unusual, namely Roman ruins that include part of the town hall and a hypocaust, or central-heating system, that dates from AD 200 and included one of the first heated floors in Britain. Brick columns supported the floor, and hot air from a nearby fire was drawn underneath it to keep bathers warm.
