Yes, kayaking in Halong Bay is a popular activity, allowing visitors to explore hidden caves, limestone karsts, and floating fishing villages. Many cruise tours offer kayaking as part of their itinerary.

Lan Ha Bay is quieter and less crowded, with equally stunning limestone formations and more pristine beaches, while Halong Bay is more famous and has well-developed tourist infrastructure. For a peaceful experience, Lan Ha Bay is better, but for iconic sights, Halong Bay is ideal.

Wear quick-dry clothes, water shoes or sandals, a hat, sunglasses, and sunscreen. A waterproof bag for your belongings is also recommended.

Yes, it is generally safe to swim in designated areas of Halong Bay, but water quality varies depending on location. Always check with your tour guide and avoid swimming in busy boat areas.