Hagukan Cave

Hagukan Cave is a semi-submerged natural cave located on Bucas Grande Island within Sohoton Cove National Park in Socorro, Surigao del Norte, Philippines. Accessible only at low tide through a low, narrow entrance that requires swimming or ducking, the cave is known for its stalactites, stalagmites, and luminous water that glows when disturbed. It is a key stop on guided Sohoton Cove island-hopping tours and showcases the karst landscape of Bucas Grande.

Visitors reach Hagukan Cave by motorized boat as part of a guided Sohoton Cove National Park tour from Socorro. Access is only possible at low tide through a low entrance that requires swimming, wading and ducking. Inside is a dark chamber with stalactites, stalagmites and limestone formations surrounding a shallow pool. When the water is disturbed it can appear to glow due to bioluminescence. The cave is viewed briefly with a guide and life vest before returning to the boat to continue the cove tour.