Cat Ba is the largest island in the Cat Ba Archipelago, located in Ha Long Bay, Vietnam. It is known for its stunning natural landscapes, featuring limestone cliffs, sandy beaches, and lush forests. The island is part of Cat Ba National Park, which is home to diverse wildlife and offers various hiking trails. Visitors to Cat Ba can enjoy activities such as kayaking, rock climbing, and exploring the local fishing villages. The island also serves as a base for tours to the surrounding islands and islets in Ha Long Bay, making it a popular destination for both adventure seekers and nature lovers.