Bababu Lake, 10.074197°N, 125.509106°E, is in Barangay Basilisa, Dinagat Island- Province of Dinagat Islands. It is accessible from Surigao City via a 1.5 hour boat ride. The lake is approximately 200 meters in diameter.
The lake cave (Cave Entrance) is at 10.075459°N, 125.508469°E, which is approximately 700 meters from the sea outlet. The sea outlet is at Kabun Cove, Agongon (Cave Exit) 10.079940°N, 125.505360°E.
The area is also an upcoming tourism destination. The underwater cave tunnel system discovered in 2012 has been initially measured to be approximately 700 meters long, making it the longest natural underwater cave tunnel in the Philippines and in Southeast Asia.
After being identified as a eco-tourism site by the Local Government Unit, there has been a surge of the number of visitors going to the area. Concerned stakeholders now fear that the opening of the site will result in the degradation of the critically fragile ecosystem and will result to the loss of the still undocumented biodiversity treasure.
Habitats: Heavily forested karst area with lake, sea basins, coves & surrounding islets.
Key Diversity Areas: Freshwater lake, forest area, corals in the basins
Trigger Species: Freshwater fish, shrimps, sponges, urchins & unknown species