Halong Bay

Three hours east of Hanoi by road, Halong Bay is the limestone-karst seascape that ends up on every Vietnam postcard — nearly two thousand islands rising vertically from a green-gold sea. The standard visit is a one- or two-night cruise on a junk-style boat: kayaking through cave passages, swimming in calm coves, watching the sun rise from the deck. The crowds are real; for fewer boats and the same geology, try Lan Ha Bay (just south, accessed from Cat Ba Island) or Bai Tu Long Bay (just north).

Halong Bay at sunrise with hundreds of limestone karst islands rising from an emerald sea and a traditional wooden junk boat with red sails in soft pink and gold light
Halong Bay at sunrise.
Sung Sot Cave interior, a vast limestone cavern with dramatic stalactites and stalagmites lit warm artificial light and a wooden walkway winding through the chamber
Sung Sot Cave interior.
Floating fishing village in Halong Bay with colorful wooden houses on pontoons clustered between towering karst cliffs and small sampans tied alongside
Floating fishing village.
Two travelers kayaking on clear blue-green water beneath an immense limestone arch in a hidden lagoon surrounded by jungle-covered cliffs in Lan Ha Bay
Lan Ha Bay kayaking.

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