Rethymnon hosts several accessible beautiful canyons. The most famous is the Gorge Kourtaliotiko, in which flows the river Megalos that ends at the beautiful beach of Preveli with the dreamy palm grove. The gorge has the largest quantity of water in Crete and river trekking along its bed, from the springs to the beach, is an exciting experience. Other hiking-friendly canyons of Rethymnon include the twin Kollita gorges at the area of Argyroupolis, the gorge Kotsifos by Plakias, the gorge of Saint Anthony at Patsos, the gorge Prasano and the gorge Platania. Next to the town of Rethymnon there are the lush canyons of Myli, Vederi and Gallos.
Swallows' Canyon 
The Gorge of Swallows is located 33km south of town of Rethymno city, next to the famous beach of Preveli with the majestic palm grove and the stunning river. It starts close to the village Drymiskos, runs almost parallel to the canyon of Kourtaliotiko (that of Preveli) and ends at the beach of Drymiskiano Ammoudi. It’s name is taken after the the swallows that arrive in the area every summer.
The canyon Kakoperatos is located by Agios Vasilios village at the province of Agios Vasilios. It’s a tributary of the Megalos River (Kourtaliotis) and as its name suggests (bad passage in Greek) it cannot be accessed from humans (by trekking).
Platys (i.e. wide) river is one of the rivers of foremost importance in Crete, flowing all year round. It gathers almost all water quantities of Amari Valley and leads them to the beach of Agia Galini. At a secret location between the settlements Agia Paraskevi, Vyzari, and Petrohori, the wide river gets narrow and forms two impressive ravines. The first is the small Mesa Faragi (inner gorge), reminding of the gorge of Kourtaliotis.
Kissano Gorge is located 1km north of Kissos village, in Amari valley, and 34km southeast of Rethymnon, connecting the village το the small plateau of Gious Kambos. It is a short, but beautiful gorge, crossed by the rural road of the area.
Approximately two kilometers northwest of the village Karines at position Faragi there is a small but impressive gorge, Kariniotiko Gorge. Kariniotiko canyon is completely unknown as the entire surrounding area is not included in the tourist routes. However, the surrounding area has exceptional natural beauty and hosts one of the most impressive oak wood of Crete with huge ancient trees.
The lush canyon of Vederi starts from the village Fratzeskiana Metohia, passes next to the village Vederi and ends on the beach of Gerani (after 7km). The canyon has dense vegetation that makes trekking very difficult, as there is no footpath along its length.
Kollita Gorges, i.e. Twin Ravines are located nearby the picturesque village Argyroupolis, about 22km southwest of Rethymnon city. They are named so, as they consist of two parallel canyons that end near Kato Poros settlement. Here we refer to the easternmost gorge of Moundros.
The canyon is formed north of Rodakino village and is inaccessible without the use of canyoning equipment. It starts south of the summit of Kryoneritis Mount and after 5km it merges with the canyon of Sykia, just before reaching the bridge of Rodakino.
