The Fyli's ancient castle is Parnitha's mountain most famous fortress.
Fyli's ancient castle
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© FrogenLeaf, 20071/250 second
Feb 18, 2007, 2:20:00 PM
Adobe Photoshop CS6
The most famous and most beautiful fortress is "Fyli's Castle", situated at West Parnitha, at an altitude of 687m. North of this castle, at "Vouno Fylis" location, there was a much older castle, remnants of which are still visible. That was the location of the Ancient town of Fyli, the inhabitants of which, belonged to Oiniida Tribe and wore white clothes, according to Aristophanes. The Athenians used this old castle to resist the tyrant Peisistratus during the 6th century B.C. Also, in 403 B.C., Thrasyvoulos conquered the castle with 70 soldiers and brought down the 30 tyrant's regime in Athens. The unsuitable position of that fortress caused its abandonment and during the 4th century B.C. the new castle seen today was built, in a more appropriate position, with excellent view. South-East of the new castle, along the road leading to Athens, traces of wheels of coaches can still be seen on the rocks.
Source : parnitha-np.gr
You can see the location on the map and in Google Earth (KML)