Benteng Pendem (Cilacap)

Entrance to Benteng Pendem
Water recreation area
Barracks
Fortifications
Entrance to the tunnel
The moat

Benteng Pendem (Indonesian for "Buried Fort"; Dutch: Kustbatterij op de Landtong te Tjilatjap) is an abandoned Dutch fortress in Cilacap Regency, Central Java, which has become the region's main tourist attraction. Built between 1861 and 1879, the fortress originally served to defend the important port of Cilacap, though after a series of changes in ownership it fell into disrepair in the 1960s. In 1987 it was opened to the public.

The pentagon-shaped site covers 6.5 hectares (16 acres), and consists of both original buildings – including barracks, a clinic, and a prison – as well as several later additions. It is a Cultural Property of Indonesia.