Pulau Kaget is a small uninhabited island in the Barito River about thirty kilometres downstream of Banjarmasin, designated as a nature reserve to protect a wild population of proboscis monkeys. The journey down the river is a long half-day from the city.
Boats approach the island in the late afternoon when the monkeys come down to the waterside trees to feed and roost. Land access to the reserve itself is restricted but the river circuit gives close views. The trip is usually arranged with a private operator from Banjarmasin or through a hotel; the speedboats from Jalan Pos can be chartered by the day.