It borders on the coastal towns of Atimonan, Gumaca, Plaridel, Lopez, Calauag, and the islands of Alabat.

White-sand beaches are found in the villages of Capaluhan, Santo Angel, Talingting, Pangahoy, and Dapdap of Calauag.

The island of Alabat (33 km long) has an extensive mangrove fringe along its southwest shore, with several hundred hectares of intertidal mudflats exposed at low tide.

Large portions of the original mangrove forest have been degraded or completely destroyed for the construction of fish and shrimp ponds.

[3] During the invasion of the Philippines in World War II, Japanese forces landed on three locations: Mauban, Plaridel (then Siain) and Atimonan.