There are a lot of natural wonders in Vietnam. And i think Ha Long Bay is the most beautiful of all. Ha Long Bay was twice recognized by UNESSCO as a World Cultural Heritage. There are many limestone islands of different shapes, sizes and amazing colors. It is beautiful during for seasons. Spring last only in March and April but it's the best time to go to visit Ha Long Bay with warm weather. Summer from May to August, at this time, both sky and sea are blue and clear. It's very suitable for a boat trip to the island and take some photo. In the fall around September and October, Ha Long Bay brings a beautiful color like honey with peaceful beauty. The remaining four months are winter. It's suitable for tourist who want to enjoy the cold weather and the magic beauty in the thin mistof Ha Long Bay. When you come to Ha Long, you can enjoy its natural beauty and I believe you won't forget it.