On the southeast side of Hymettus near the area of Vari, this open precipice impresses you with its mouth and runs 20 meters deep. Speleologists practice climbing up and down over here.
There is a lack of landmarks for the 75 hiking paths on this mountain, but there is a guide called Footpaths of Mt. Parnitha and map by Road Editions that outline these hikes well.
Mount Hymettus is famous for its thyme-scented honey. It is covered with beautiful pine forest, impressive caves, historic monasteries and many marked footpaths, just a five or ten minute drive from downtown Athens.
The closest and largest birdwatching locale in the city is the mountain of Hymettus or Imittos in Greek. It is about 20 km long and 1026 km high, offering a great location to hike and spot birds.
Right outside Agios Konstantinos (Kamarizas) on the way to the church of Agia Triada is Chaos, a unique geological phenomenon in Attica. It is a large round gulch with a perimeter of roughly 500 meters and a depth of 70 meters.
This is the highest peak near Athens towering at 1,400 meters. Past the cable car station at the upper elevations in the mornings and evenings is bound to reveal the most birds. You could spot a Coal Tit, Firecrest, Flycatcher, Great Tit, Jay, Magpie, Sardinian Warbler, Western Rock Nuthatch and more.
This area was revamped during the Olympic games, creating rowing lakes. The trees near the beach, including large confiers, a creek and some greenery have attracted birds here.
Also noteworthy is Lycabettus or Likavitos Hill in Athens almost in the centre of town. In addition to great views of the port of Piraeus and all of Athens, a rocky area on top attracts many rock-loving birds. You might see a Bunting, Chaffinch, Great Tit, Sardinian Warbler and many more.
The most well-known cave on Hymettus is Koutouki cave in Peania which hosts guided tours. Sadly, too much lighting and human presence has degraded the natural characteristics of the cave.