This is the Reine d'Angleterre, a thermal baths site in Italy. It is one of many such establishments in the region, where natural hot springs have been harnessed for bathing and health since antiquity.
Description via source. Coordinates and heritage data from the Atika atlas.
Atika pings you when you walk or drive past heritage like this. Works offline, no account needed to explore.
Short, true stories of overlooked heritage sites, drawn from the Atika atlas. Free, no spam.