When it comes to Vietnamese tourism, you have to mention Hạ Long Bay. The karst seascape of Halong Bay is one of the world’s most spellbinding sea views and is a UNESCO World Heritage Site. Thousands of limestone islands sit within this bay in the Gulf of Tonkin, eroded into jagged pinnacles by wind and water action over millennia.
The rampant commercialization of this natural wonder may detract from its raw, undeniable beauty, but you have to escape the crowds first. Try to get on a reputable tour boat, or stay on Cát Bà island.