Cat Ba Archipelago is located about 60 km from the center of Hai Phong, consisting of 388 islands and covering approximately 31,150 hectares. The archipelago lies south of Ha Long Bay and adjacent to Lan Ha Bay, forming one of the most scenic coastal regions in northern Vietnam.

As the largest island in the archipelago, Cat Ba is known as the “Pearl of the Gulf of Tonkin,” featuring dramatic limestone karsts, tropical forests, and rich marine ecosystems. Covering approximately 285 km², the island offers diverse landscapes including rainforests, mangroves, coral reefs, beaches, and cave systems.

The archipelago was recognized by UNESCO as a World Biosphere Reserve in 2004, and in 2023 was inscribed as part of the Ha Long Bay - Cat Ba Archipelago.

Home to tens of thousands of residents, Cat Ba blends unspoiled nature with authentic local life. It is an ideal destination for exploring traditional fishing communities, enjoying scenic boat journeys, and discovering a quieter, more meaningful side of Vietnam.