Létrás Cave, Cave in the Bükk National Park, Miskolc, Hungary

The Létrás Cave (Létrási-vizesbarlang) is a 3,757-metre cave system on the eastern Bükk Plateau in Miskolc, with two entrances at 558 and 575 metres above sea level. Its passages run through Triassic limestone and connect two levels via rubble-filled or steep-walled chambers. At 68 metres' depth lies a 30 m³ lake fed by a seasonal stream, its outflow blocked by a siphon. The average temperature is 8–10 °C.

Amateur cavers explored the first 150 metres before the 1950s, and the terminal lake was first reached in 1963. A survey map was drawn in 1975 using the 1963 and 1964 measurements, and in 1976 the cave gained national significance status. By 1977 it was listed as roughly 2,220 metres long and 85 metres deep.

The cave's name appears in many forms in the literature, from Létrás Cave and Létrás-tető Sinkhole-cave to Létrási-víznyelőbarlang and simply Vizes. It lies on Létrás-tető, where a seasonal stream disappears underground; the cave absorbs this watercourse, and a lake 30 m³ in volume sits at 68 m depth, fed by the same seasonal flow.

Part of the cave is open to visitors on guided tours organised by the Bükki National Park Directorate; the rest can be entered only with its permission. The interior stays around 8–10 °C, so bring warm clothing and sturdy footwear. The artificial entrance lies about 50 m from a small house above the stream, while the natural sinkhole entrance is 60 m southwest behind the ridge.

The cave's passages cross beneath a public road, and the far end lies under the Szárdóka porphyrite ridge. In winter, ice stalactites form near the entrance, while the Zebra-folyosó passage shows water-dissolved limestone plates. The largest stalactite in the cave is among the features photographed in the 1979 book Barlangok a Bükkben.