On the trail leading from Agios Ioannis to Koudoumas monastery we meet an impressive cave, shaped Δ, in which there is the small church of Saint Anthony. The cave hosts stalagmites and stalactites. One stalactite, has the shape of Saint Anthony, and a pit where there is an icon of St. Anthony.
The cave was used as a residence of hermits. The cave is visible throughout the route from Agios Ioannis to Koudoumas, as the entrance is particularly impressive with a height of 35m. It consists of a large hall, 60 meters long, and an average width of 10m.