Traveling to Cat Ba certainly cannot miss Monkey Island. Not only famous for friendly monkey troops, but Monkey Island also has an extremely beautiful beach. It only takes 15 minutes to quickly travel to this island. However, note the period from May to August. During this time, the waves are quite large, so if you prefer calm conditions, choose other time periods. In addition, you can also come here to experience activities such as mountain climbing, kayaking, swimming, etc.