While the lake’s therapeutic benefits are among its main draws, it’s also popular for recreational activities. The water temperature is consistently between 71℉ and 84℉ (22℃ and 29℃), which makes for pleasant swimming, and at the bottom of the lake is a labyrinth of underwater caves with 14 tunnels. There are beach chairs and umbrellas near the lakeshore, and a nearby restaurant serves traditional Greek food. Visit the lake independently, or join a small-group walking tour of the area that includes beach time, a tour that combines a visit to the lake with Athens highlights, or a tour that visits the lake in conjunction with stops at Cape Sounion and the Temple of Poseidon.