Greek Baths in ancient Olympia
The Greek Baths in ancient Olympia are the earliest baths in the sanctuary and they are situated on the west side, outside the sacred enclosure of the Altis, near the bank of the river Kladeos. They were constructed during the 5th century B.C. and developed throughout their use.
Source: Wikipedia — Greek Baths in ancient Olympia (CC BY-SA 4.0)