Skantzoura is an 8 km2 large and flat island with hills and with large parts of its shores made of white marble. It is situated at about 25 to 30 kilometer distance south / southeast of the island of Alonissos. The vegetation on Skantzoura is quite low with shrubs but there is also a forest with low cedar trees and there are olive groves. Skantzoura used to be a monastic island, but the Monastery of Evangelistria which is situated in the middle of the island is now closed. On the island live and breed rare species of birds like the Audouin's Gull and Eleonora's falcon.
The monastery is old and interesting with a church, and several outbuildings, stables and storage rooms. Behind the monastery are terraces which were the former vineyards. Near the coast are the ruins of an even older monastery, the first monastery that was built on the island.