The canyon of Koudoumis is located about 27km west of Sitia, near the village Tourloti. The canyon is accessible on foot, but it has six small steep rappels that require little attention.

The canyon is also called Tourloti Gorge as its exit is located close to Tourloti and its entrance is located at the small plateau Monokara, a few kilometres further to the south. The stream flowing in it transfers water to the beach of Mavro Seli near Mochlos. The impressive rock formations and the blooming nature of spring make trekking in the Koudoumis gorge very interesting.