The Szelim cave is located in northwestern Hungary at the western margin of the
Gerecse Mountains, 289 m above the Által-ér Valley near Tatabánya city. The cave interior is 45 m long and 14 m 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.
Wikipedia https://en.wikipedia.org/wiki/Szelim_cave
Official Website https://termeszetvedelem.hu/talalati-oldal/?type=orszagos-barlangnyilvantartas&id=4630-8
Address 2800, Hungary
Coordinates 47°35'25" N 18°24'24.913" E