1. Some World Heritage sites in Vietnam are:
- Ha Long Bay
- Hoi An Ancient Town
- Hue Monuments Complex
- My Son Sanctuary
- Phong Nha - Ke Bang National Park
2. As an AI language model, I don't have personal preferences or feelings, but I can provide you with some information. Vietnam is a beautiful country with many wonderful places to visit. One of the most popular tourist destinations in Vietnam is Ha Long Bay, known for its breathtaking natural scenery with thousands of limestone islands and islets rising from the turquoise water. Another place that many visitors love to explore is Hoi An Ancient Town, with its charming traditional architecture and vibrant atmosphere. Hue is also a fascinating city to visit, with its rich history and cultural heritage. It's home to the Hue Monuments Complex, which was recognized as a World Heritage Site by UNESCO. Finally, for those who enjoy adventure and nature, Phong Nha - Ke Bang National Park is a must-visit destination. The park boasts stunning landscapes, including the world's largest cave, Son Doong Cave.