In the east Asterousia range and west of the village Mournia is formed the small fertile plateau of Pervola which is full of vineyards, olive trees and gardens and is the "orchard" of the village. Here is the picturesque church of Saint Irene (Agia Irini) with a spring of fresh water next to it. The waters of this small plateau are concentrated in the stream Perivoliano, which later forms the wild gorge of Pervola (also known as Gerontzou) that ends on Kaminaki beach. The total length of the gorge is about 4 km and is not recommended for beginners.
There is no marked path for the descent in the gorge and hikers walk next to or within the flow of the stream. In the first half of the gorge we meet impressive geological formations such as narrow passages, less than 4 meters wide, small and high waterfalls (up to 25 meters), phyllite rocks (reddish-white) and caves. The second half is clearly easier to walk than the first, but similarly steep. The last narrow part of the first half can not be crossed without technical equipment (canyoning) due to the continuous waterfalls where the last and highest is 25 meters high. Alternatively, it can be bypassed from the side with careful hiking that will take you to the bottom of the gorge and close to the sea. The inaccessibility of the area and the altitude difference between the starting point and the beach of Kaminaki (about 500m) limits the number of visitors to this gorge.
Descent takes 2 1/2 hours and ascent takes 3 hours