Το σπηλαιοβάραθρο του Ψακοφάραγγου βρίσκεται σε μικρό πλάτωμα σε υψόμετρο 1320 μέτρων στα όρια της κοινότητας του Ζαρού. Το όνομα το παίρνει από το φαράγγι του Ψακοφάραγγου που καταλήγει στη καρδιά του δάσους του Ρούβα
A few meters east of the small beach Koutalas and on the rocky coastline of Drapanos we meet one of the many caves in the area of Kokkino Chorio. It is the imposing cave of Koutalas, known to some as Nerospilia (Water Cave), even though Nerospilia is located in another nearby location.
The Katsikali sea cave is located on one of the steepest coasts of Asterousia, between the Koudoumas monastery and the beach of Tris Ekklisies and within the administrative district of the village of Paranymfi.
Dragonada island and in general the complex of the Dionysades islands, in addition to its ecological interest due to the population of Eleonora's falcon, also has exceptional geological interest.