Monkey Island (Cat Dua) is accessible only by boat, but travelers who make the effort to get there are rewarded with numerous outdoor adventure possibilities, including access to a private beach. Visitors to the isolated Halong Bay island can spend time sipping coconut water on a white-sand beach; snorkeling or kayaking in the shallow turquoise waters; hiking the well-marked trails to the top of the island, or simply taking in the fresh air and lush island scenery.
While the island is perfect for a day trip, accommodations such as the Monkey Island Resort also exist for travelers who prefer to spend several days enjoying this out-of-the-way place.
As the name suggests, Monkey Island is home to wild long-tailed macaque monkeys who were introduced to the island years ago. While accustomed to having humans around, the monkeys can be aggressive—keep a respectful distance, and don’t try to touch or feed them.