About 50 km south-west of Athens in the Saronic Gulf is a small peninsula of volcanic origin of methane, which is part of the Hellenic volcanic arc. It is believed that the volcanic activity in the area dates back a million years ago. Today on the peninsula has lots of tectonic faults, and the area is recognized as a seismic zone.

In general, on the peninsula of Methana geologists it found more than 30 craters, most of which are andesitic and dacitic volcanic dome. The largest volcano on the peninsula has two domes, one of which still smokes, and its height is 760 meters above sea level. The last large-scale eruption of the volcano was recorded in the III century BC (written mention of it found in Pausanias, Strabo and Ovid), and today it has the status of a potentially active. Methane Volcano is the only active volcano on the mainland of Greece (the other active volcanoes are located on the Greek islands). From its summit offers stunning panoramic views of the Saronic Gulf and the picturesque landscapes of the peninsula.

Methane Peninsula inhabited since prehistoric times more. During the archaeological excavations were found Mycenaean settlement, the sanctuary of the geometric period, two of the ancient acropolis and many valuable artifacts that can be seen in the museums on the island of Poros and Piraeus.
The closest population center to the top of the volcano is a small village Kameni Chora, which means "burnt village". Local residents are engaged in agriculture, as well as in the sphere of tourist services. On the peninsula of the same name is located and resort town, which is famous for its geothermal sources of hydrogen sulfide. This is one of the largest spas in Greece.