The Astrakiano gorge (or gorge of Karteros) is quite a long gorge with a total length of about 12,5 km. The entrance is after the settlement of Kato Astrakoi and its exit is in Mesa Karteros, a recreational area situated in a site of exceptional beauty. You can reach the village of Astrakoi by bus from Heraklion (18.5 km) and from the village of Myrtia. The gorge is crossed by the river Karteros. There is a well-marked walking trail and the total duration of the route is about 3.30 hours. There used to be 10 watermills in the gorge and the locals were fishing eels and crabs in the river.