Hinagdanan Cave is a cave in the municipality of Dauis on Panglao Island, in Bohol Province, in the Philippines. It is a naturally lighted cavern with a deep lagoon and many large stalactites and stalagmites. The cave is lit by sunlight which filters through holes in the ceiling. The underground lake is a popular swimming spot, but it has been known to test for high levels of various pollutants, since it is fed by ground runoff. Hinagdanan Cave is made of limestone.