Sas-kövi Cave, artificial cavity in Szentendre, Hungary

Sas-kövi is a cave in the Visegrád Mountains near Szentendre with a total length of about 63 meters. The entrance sits at the base of a steep rocky cliff and leads into a system of corridors, chambers, and narrow passages that were formed by water and later expanded by people.

The cavity was first mentioned in print in 1920 by Barcza and Thirring, who described an abandoned quarry on the Saskövi dűlő with the cave entrance among bushes. In 1921 the Budapesti Egyetemi Turista Egyesület mapped its floor plan with a self-made theodolite. Archaeologists Vastagh and Wein later argued the passage is an artificial mine tunnel, not a natural cave.

On foot, take the H5 suburban railway to its terminus, then the bus toward Pismány and walk from the terminus along Cseresznyés út. By car, turn onto Cseresznyés út at the Pismány sign from main road 11, then right onto the gravel Vándor utca near the top and park at Tyúkosdűlő út. A path beside unfenced plots leads up to the 1.5 m wide, 2.2 m high entrance.

The passage is not a natural cave: Vastagh Gábor and Wein György considered it an artificial mine adit, and Gönczöl Imre suggested its makers followed the calcite vein visible inside rather than quarrying tuff. The vein, 15–30 cm thick and water-clear crystalline, can still be seen in the ceiling at the corridor's bend.