The most impressive of the three forts that make up the Komarom system — and the most accessible. Visitors enter through the original main gate, walk an outer rampart that has settled half a metre into the ground, and tour the casemates and the underground gunpowder magazines. Some of the rooms hold a permanent exhibition on Hungarian military history; others are used for art installations and theatre productions.
The fort is genuinely big — the perimeter is more than four kilometres — and you should plan two hours minimum. Walking shoes; the inner corridors are cool and slightly damp even in summer. A small cafe near the main courtyard serves coffee and the inevitable lángos.