1. Departure from the Harbor (8:00 AM): Start your day early by departing from the Tuan Chau Harbor in Halong Bay. Ensure you arrive at the harbor a little earlier for check-in and boarding procedures.

2. 12:00 Welcome Briefing: Once on board the cruise staff will provide a welcome briefing, including important safety instructions and an overview of the day's activities.

3. Cruise Through Halong Bay: Enjoy the breathtaking scenery as you cruise through the emerald waters of Halong Bay. The limestone karsts and islets rising dramatically from the sea create a stunning backdrop.

4. Visit Sung Sot Cave (Surprise Cave): Disembark at Sung Sot Cave, one of the most famous and impressive caves in Halong Bay. Explore the cave's unique formations and learn about its geological history from your guide.

Lunch (12:00 PM - 1:00 PM)

5. Lunch on Board: Return to the cruise ship and savor a delicious Vietnamese or international buffet lunch as you continue to enjoy the stunning views of Halong Bay.

Afternoon (1:00 PM - 4:00 PM)

6. Visit Ti Top Island: After lunch, your cruise will head to Ti Top Island. Hike to the island's summit for panoramic views of Halong Bay from the viewpoint. It's a bit of a climb but well worth it for the breathtaking scenery.

7. Kayaking or Bamboo Boat Ride: Depending on the cruise itinerary and your preferences, you may have the opportunity to go kayaking or take a bamboo boat ride through the serene waters, exploring hidden corners and limestone formations.

8. Relax on the Sundeck: Spend some time relaxing on the cruise ship's sundeck, taking in the natural beauty and tranquility of Halong Bay. You can also enjoy some refreshing drinks from the bar.

Late Afternoon (4:00 PM - 6:00 PM)

9. Return to Harbor: Cruise back to Tuan Chau Harbor, enjoying the last views of Halong Bay's stunning landscape.

10. 17:30-18:00: Disembarkation: Arrive back at the harbor, and disembark from the cruise ship. Say goodbye to the friendly staff and fellow passengers.

Please note that this is a sample itinerary, and the specific activities and timing may vary depending on the cruise company you choose and the package you select. Always check with your chosen cruise provider for the most up-to-date information and any additional activities or inclusions they may offer. Additionally, Halong Bay is subject to weather conditions, so the itinerary may be adjusted accordingly for safety reasons.