Szelim cave

The Szelim cave (Hungarian: "Szelim-barlang" or "Szelim-lyuk" (Szelim hole), "Bánhidai nagy barlang" (Bánhidian big cave), "Eperjes-barlang, Szemi-luki, Szemi-lyuka, Szelimluk barlang, Bánhidai-zsomboly, Szent Vit-barlang") is located in northwestern Hungary at the western margin of the
Gerecse Mountains, above the "Által-ér Valley" near Tatabánya city. The cave interior is long and high. The site has been regularly frequented and used as a shelter by local villagers over the centuries, is easily accessible and its huge rectangular entrance features a memorial of the Turul. 
Geology.
The karstic cave was formed during the Upper Triad, has undergone and will further undergo extensive corrosion. Meteoric water infiltrates the compact Mesozoic
limestone and is going to carve cavities into the bedrock, solve the limestone and abrade the cavities with the debris and rocks. 
Excavations.
The cave was recognized as an archaeological site only relatively late. In 1932 Hubert Kessler, the first promoter of speleological research, began excavations. The results of Kessler work encouraged István Gaál to start regular excavations. In 1934 the "Natural History Research Council" supplied - although insufficient - the financial means for further work. Remains of hearths, stoves, carvings, animal bones and human remains, some of which date to the era of Turkish invasions in early modernity were excavated.
The sediments are more than deep and rich in archaeological finds, that were extracted to the bedrock in a few months in most of the cave.
More recent research results confirm the notion that human occupation in Szelim dates back as far as 200,000 years BP. Mousterian artefacts and stone tools discovered in the stratae date back to the Upper Paleolithic.
In 2013 the Hungarian Ministry of Interior declared the site a protected natural national asset.
Legends of the cave.
The cave is subject to several historical legends.