Cavinti Underground River and Caves Complex

The Cavinti Underground River and Caves Complex is a natural karst attraction in Barangay Paowin, Cavinti, Laguna, Philippines, on the edge of the Sierra Madre foothills. It comprises interconnected limestone caves, an underground river, stalactite and stalagmite formations, and natural pools. Managed by the local government for eco-tourism, it is notable for guided spelunking, river trekking and swimming through cave passages within a forested landscape near Lumot Lake.

Visitors can expect a guided exploration starting from the registration area in Barangay Paowin, followed by a short trek to the cave entrance. Inside are limestone chambers with stalactites and stalagmites, narrow passages, and sections of underground river where wading and swimming are required. The surroundings are forested karst terrain with natural pools and river channels. Guides provide helmets and lamps and explain formations along the route.