Saigon active nice nightlife. Many young tourists, must see. Nha Trang nice beach, water not very clear, good food, dream city for Russians and Chinese. Hoi An more like Vietnam, worth of visit. Hanoi capital, we had a very nice weekend, good for shopping. Halong Bay sailing was romantic. We used bicycles, train, minibusses, domestic flight, all fine. Traffic chaotic but working. We will go another time and can recommend.