Caves
The slopes of the mountain hold many caves. The largest and best known is Koutouki Cave, on the east side above Paiania, at about 510 metres above sea level.
According to the Greek Wikipedia, Koutouki was found by chance in 1926 and mapped in 1954 by Ioannis and Anna Petrocheilos. The year of discovery is given differently in other sources we saw, so we do not treat it as certain. The present artificial entrance was opened in the 1960s and the tourist route is 350 metres long.
The cave is one chamber of about 60 by 60 metres with 55 columns. The natural entrance is a 38 metre deep shaft in the roof. Bats live there, and so does the endemic cave cricket Dolichopoda petrochilosi. A 2020 3D mapping study estimated the original cavity at 6,900 cubic metres.
The Lion cave lies on the eastern side of the mountain at 550 metres, west of Glyka Nera (according to the Ministry of Culture), and is named after the lion said to have lived on the mountain. Read the article about the two caves.
Opening hours and ticket prices are not given, because they were not verified.
Where sources differ, the text says so. No visiting hours are given, because they have not been verified. Check before each visit.