Cat Ba Island is the largest of the 366 islands spanning 260 square kilometers that comprise the Cat Ba Archipelago, which makes up the southeastern edge of Lan Ha Bay in Northern Vietnam. Cat Ba Island boasts a breathtaking montage of lush forests, serene beaches, and rocky cliffs. About half of its area is covered by a national park, which is home to the endangered Cat Ba langur, a primate species native to the island. The island features a complex of limestone caves and has a number of ecotourism resorts and traditional fishing villages that are worth exploring. Visitors to Cat Ba Island can indulge in a variety of activities such as rock climbing, hiking, trekking through the national park, kayaking, scuba diving, and enjoying boat tours to the nearby uninhabited islands. The island is a unique ecological haven with its biosphere reserve status recognized by UNESCO. Its landscape is a fusion of rugged features and tropical luxury, making it a fascinating destination for adventure travelers and nature lovers alike.