The Sultan Suriansyah Mosque stands near the Kuin River about 4km north of Banjarmasin's city centre, in the area that was once the heart of the old Banjar kingdom. The mosque is small and made of ironwood — the dense, rot-resistant timber of Borneo that has allowed the building to survive for nearly 500 years. The interior is open and simple, with a wooden floor and pillars.
The area around the mosque contains the tomb of Sultan Suriansyah, a site of pilgrimage for Banjar Muslims. The riverbank location means you can combine a visit here with a klotok trip on the Kuin River, which was the commercial heart of the old city. The mosque is at its most atmospheric during the call to prayer, when the sound carries over the water.