Ruins of Szádvár, Medieval fortification ruins in Aggtelek National Park, Hungary.

Szádvár is a medieval castle located atop a hilltop in Aggtelek National Park. Limestone foundations are scattered across the exposed summit and are surrounded by rocky slopes that open toward the Szögliget basin and Bódva valley.

The castle was first documented in 1268 and changed hands several times over the centuries. In 1686, the Habsburgs ordered its destruction to prevent rebel forces from using it as a stronghold.

The Szádvárért Baráti Kör, founded in 2007, runs volunteer conservation camps on the ruins: Vármentő Napok around mid-March and 23 October, and a Vármentő Hét in summer when participants join the archaeological excavations. The programmes are open to anyone who registers in advance. The castle's restoration received an ICOMOS award in 2021.

A roughly 4.5-kilometer loop trail connects the Salamander House in Szögliget to the castle ruins and takes about three hours to complete. The path crosses hilly terrain, so visitors should wear sturdy shoes and bring water.

The castle's final stone form, with four courtyards separated by stone walls, was completed under Ferenc Bebek and his son György in the 16th century. Heavy goods were hauled up the steep northern slope by a ropeway driven by a horse-powered pulley system, a detail visitors rarely notice among the ruins.