River cave where an underground river runs the length of the visited section, with stalactites, bats and a collapsed mill hall open to the sky. Visits are by hourly guided tour only, mostly in Greek, along walkways and bridges above the water.
Highlights
- Underground river
- Stalactite columns over the water
- Mill hall with open roof
Good to know
- Tour lasts about 40 to 60 minutes
- Constant 17°C inside, bring a jacket
- Often flooded autumn to spring, call ahead
