In the area of the Municipal District of Agios Nikolaos, on the road to Trachela, 3.5 km to the west is the unexploited Cave "Katafigio", considered to be one of the largest in the country, according to experts who have visited it.
In the past an underground river passed through it, opening a multi-channel channel system in marble. The certain extent of its galleries is 900 m, but its total length is estimated at 1,600 m. Great for swimming and diving.