Bar Reef Marine Sanctuary is Sri Lanka's largest coral reef and a protected area, located off the coast of the Kalpitiya Peninsula in the northwestern province.

Established as a sanctuary in 1992, it spans approximately 307 square kilometers and stretches from the northern tip of the Kalpitiya Peninsula to the Gulf of Mannar.

This vibrant marine ecosystem is home to over 150 diverse coral species and a wide range of marine life.