The wild and inaccessible canyon of Mesosfini is located 55km south of Heraklion city, in an isolated area west of the seaside village of Treis Ekklisies. Its entrance is located at a height of 450m, near the villages of Mournies and Prinias, in the Asterousia Mountains. At its exit, 2km south, it is formed the majestic beach of Voidomatis, which can be accessed via a dirt track from Tris Ekklisies.
The canyon is very narrow in the beginning and then opens. The vertical descents are very large, forming waterfalls in the winter and full with huge rocks that make it inaccessible. In fact, Mesosfini Gorge is the only one in Crete with two such high descents of 70m and 80m. Thus, Mesosfini is a paradise for experienced climbers and canyoners, who have been exploring it for many years.