Tuwad-Tuwadan Blue Lagoon

Tuwad-Tuwadan Blue Lagoon is a natural coastal lagoon in Barangay Balagnonan, Pandan, in northern Catanduanes, Philippines. Formed by rock formations that create a sheltered pool connected to the sea, it is known for its clear turquoise-blue water. The site is a popular local swimming and sightseeing spot, surrounded by rocky cliffs and open sea views, and is accessed via a short trek from the barangay proper.

Visitors can expect a small rock-enclosed lagoon with clear blue-green water that is used for swimming and wading when sea conditions are calm. The lagoon is framed by natural limestone and volcanic rock formations with a narrow opening to the Pacific Ocean and surrounding cliffs. Access involves a short walk over uneven rocky terrain and a coastal trail from Barangay Balagnonan. The area has open spaces for resting and photography with views of the coastline.