Heraklion hosts many canyons, most of which cross the ranges of Psiloritis and Asterousia. Asterousia has wonderful hiking canyons, some of the most important being Agiofarago, Martsalo and Trafoulas. However, the most famous gorge is the canyon Gafaris at Psiloritis, crossing the magnificent oak wood of Rouvas. Other canyons of Psiloritis are the gorge of Kroussonas, through which passes the Minoan path to the Idaean Cave, the gorge Vromonero, the gorge Vorizano and the two small canyons of Asites (Saint Charalambos and Saint Anthony). Near Heraklion city, there are the lush canyons of Karteros, Kounavi, Sylamos, Almyros and Venerato. Moreover, the western slopes of Lassithi Mountains host the canyons of Roza, Ambelos, Apotyposi and the river Aposelemis by Hersonissos.
Apart from reachable gorges, Heraklion is home to some very popular technical canyons such as the imposing canyon of Arvi, which after an 80m high fall turns into a dark underground river. Especially the area of Tsoutsouras and Keratokambos is home to many steep canyons that have been equipped with bolts and anchors for training new canyoners.
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 village 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.
Spiliotissa gorge is located about 24km south of Heraklion. It is a lush ravine that runs from the village Houdetsi, crosses Agios Vasilios, and ends in the valley of Peza. The best part of it is that between Houdetsi and Agios Vasilios (1.5km long).
West of the village Rogdia a small gorge is formed that exits at the area of Paliokastro. It initially starts at position Koukos, where we meet the ruins of an old watermill.
Canyon Kakoperatos located 10km south of Ahendrias village, on the eastern side of Asterousia Mountains. The distance from Heraklion is approximately 66km. The gorge is only crossed with technical equipment.
The canyon of Tsoutsouras is located in Tsoutsouras village and is one of the many inaccessible canyons of the area. It starts at position Sfakias and it's exit is located near the settlement, in Larinaki area, and at first glance it causes awe.
The canyon of Panagia (Virgin Mary), also known as Kalami I is parallel to the gorge Xerofarago or Kalami II and takes its name after the former monastery of Panagia Keralimeniotissa located at its exit.
A very wild gorge starting from the valley of Pervola, next to Mournia village at Asterousia Mounts, and ending on the remote amazing beach of Kaminaki. There is a trail, quite steep, starting from Pervola.
The gorge of Valahas is formed south of Heraklion and the beach Elygia is formed at its exit. The highest rapel is 50m high and 4 hours are required for its crossing (only with canyoning equipment). The lower part of the gorge is covered by pine trees.