Eger Castle (Egri Vár) sits on a volcanic hill above the city, its red limestone walls visible from most of the town. The castle was the site of the legendary 1552 siege when a small Hungarian garrison repelled a vastly larger Ottoman force in one of the defining events of Hungarian national memory. The episode was immortalised in Géza Gárdonyi's novel Eclipse of the Crescent Moon, which remains one of the most widely read historical novels in Hungarian literature.
The castle now contains a history museum with exhibits on the siege, medieval arms and armour, and the archaeology of the site. The Bishop's Palace within the castle walls houses an art gallery. The ramparts and towers can be walked, and the views over the city and the valley are excellent. The underground tunnels and casemates beneath the castle — part of the defensive system built after the 1552 siege — can be visited separately with a guide. Allow two hours for a thorough visit.