Binsari Cave

Binsari Cave is a historic natural cave located in Binsari village, Samofa District, Biak Numfor Regency, Papua, Indonesia. It is notable as a World War II heritage site used as a shelter and defense position by Japanese forces during the Battle of Biak in 1944. The cave features natural limestone formations and preserved wartime relics, making it a significant historical and educational attraction on Biak Island.

Visitors can expect a natural limestone cave with low and narrow passages, dark interior chambers, and uneven rocky floors. Inside are remnants from World War II such as old ammunition, equipment and shelter structures. The surrounding area is forested with a simple entrance area and pathways. A local guide typically accompanies visitors to explain the cave's history and layout. The site is compact and explored on foot.

Binsari Cave served as a shelter, hiding place and defense position for Japanese forces during World War II, particularly during the Battle of Biak in 1944. The cave was used to store supplies and as a refuge during Allied operations. Remnants of that period remain inside, and the site is preserved as a historical reminder of the wartime events on Biak Island.

The cave is valued locally as a historical education site and memorial related to World War II history on Biak Island. It is maintained as a heritage tourism attraction that reflects the island's wartime past and is visited for learning and remembrance.