Onrust Island

Onrust Island (Pulau Onrust) is an historic island in Jakarta Bay, part of the Thousand Islands (Kepulauan Seribu) administratively linked to Jakarta. It was an important naval repair yard and service island during Dutch colonial rule and retains visible archaeological remains from that period.

The island’s highlights are the masonry ruins of shipyard buildings, quay structures, and grave markers that document its use for ship repair, quarantine and as a naval support base. Visitors generally see low stone foundations, scattered relics and a small interpretation area rather than large museum buildings.

The Dutch East India Company and later colonial authorities developed the island from the 17th century as a repair and supply base; over time it was also used for quarantine and as a burial site. Its role declined with changes in shipping and port infrastructure, and it is now preserved primarily for its historic ruins.

Onrust sits in Jakarta Bay within the Thousand Islands chain, off the coast of the Jakarta metropolitan area. Access is by boat from northern Jakarta; the island is commonly visited as a day trip from the city.

• Getting there: Day trips depart from Jakarta's north coast piers; visits are generally by small boat and often run as part of Thousand Islands tours.
• Site condition: Most remains on the island date to Dutch colonial use from the 17th to 19th centuries; much of the site is exposed and undeveloped, so wear appropriate footwear and bring water.

What to See #

• Shipyard ruins: An open-air archaeological area with foundations and masonry remains of shipyard buildings used by the Dutch East India Company from the 17th century onward.
• Cemetery and tombs: A small cemetery and scattered tombstones dating from the colonial period, reflecting the island's use as a quarantine and burial site.
• Museum/interpretation area: A simple local museum and interpretation panels presenting the island's maritime and colonial history, accessible to day visitors.