Nature has been extremely generous when bestowing on Vietnam's more than 3,260 km long coastline sea bays with world-class beauty. Below are 4 most beautiful bays you must visit once in your life.
1. Ha Long Bay (Quang Ninh)

Located in Quang Ninh province, about 165 km from Hanoi capital, Ha Long Bay has long been a proud symbol of Vietnamese tourism. Ha Long Bay owns a large area of up to 1,553 km2. This place makes a strong impression with a system of nearly 2,000 large and small limestone islands stretching out on emerald green water.
Thanks to that majestic beauty, Ha Long Bay was recognized by UNESCO as a World Natural Heritage Site in 1994, and one of the seven new natural wonders of the world in 2011.
This bay area owns a majestic cave system such as Thien Cung Cave, Sung Sot Cave, or Dau Go Cave. Visitors can kayak through the small pristine bays, visiting the unique life of fishermen in Cua Van floating fishing village, Vung Vieng.
The ideal time to travel to Ha Long Bay is from March to May and from September to November, when the weather changes to mild season and there are few storms.
2. Lan Ha Bay (Hai Phong)

Located in the east of Cat Ba Island and adjacent to the south of Ha Long Bay, Lan Ha Bay appears as a fairyland still retaining its wild beauty. The bay owns more than 400 large and small islands covered with lush green vegetation.
Lan Ha is a paradise for those who want to escape the noise of the city. Here, visitors can freely kayak through majestic cliffs, soak in clear water at natural beaches such as Van Boi beach, Ba Trai Dao beach. From here, you can visit Cai Beo fishing village - one of the oldest fishing villages in Vietnam.
In addition, to fully explore Lan Ha Bay, visitors can choose half-day or one-day tours.
3. Lang Co Bay (Hue)

Located about 60 km from the center of Hue city and about 25 km from Da Nang, Lang Co Bay nestles right at the foot of the majestic Hai Van Pass. In 2009, this bay was officially honored by Worldbays as one of the most beautiful bays in the world thanks to the perfect convergence of rivers, mountains, seas, islands and lagoons.
Coming to Lang Co, visitors will be fascinated by the smooth white sand stretch stretching along the vast, clear water. The space here is imbued with the romantic and peaceful beauty of Hue. In addition to swimming, visitors can combine a journey to explore the Tam Giang - Cau Hai lagoon system or enjoy fresh seafood at restaurants along the lagoon at extremely reasonable prices.
The ideal time to visit Lang Co Bay is from April to July every year, when the sea is calm and the water is crystal clear.
4. Vinh Hy Bay (Khanh Hoa)

Hidden in the sunny and windy South Central Coast, Vinh Hy is a small bay still retaining its pristine beauty. This place easily evokes nostalgia for tourists thanks to the perfect combination of blue sea, overlapping mountains and colorful coral reefs.
The special feature of Vinh Hy is its location bordering Nui Chua National Park - a world biosphere reserve. The combination of a drought-stricken forest ecosystem and abundant marine life has brought visitors unique experiences.
Coming to Vinh Hy, you can take a glass-bottom boat to see coral, check-in at the pristine rocky beach at Hon Rua or visit the poetic Bai Cau.
From May to August is the most ideal time for Vinh Hy tourism. Brilliant sunshine, calm seas, extremely favorable for diving and trekking activities to explore nature.