Davelis Cave (Greek: Σπήλαιο Νταβέλη) is a well-known cave in Penteli, a mountain to the north of Athens, Greece. The cave's name comes from the wide belief that an infamous 19th century brigand called Davelis used the cave as a hideout. The story says that Davelis hid his treasure inside the cave. (there are however some who believe that Davelis even ignored the existence of the cave). In antiquity there was a sanctuary of the god Pan, during the Middle Ages it was a hermitage of ascetics, to which it also owes its oldest name "Cave of Ammon". It is said that some of these ascetics lived until the end of their lives in the depths of the cave.
In 1977 new projects were launched by the Ministry of National Defense. An attempt was made to keep these works secret. Following a publication in a newspaper on 6/10/1977, the GES (ΓΕΣ) was forced to admit that the army had started extremely credible projects in the Davelis Cave! Naturally, rumors began to mount. Especially as the area was declared military and guarded.
The cave has been associated with paranormal activity since the ancient times, this being the main reason behind its use as a place of worship. The mystical character of the cave continues to fascinate people even today, and dozens of urban legends connected to the cave exist. Proof of ceremonies inside the caveCarved footprint of a hand, which according to visitors of the spot has inexplicably changed position many times.