Halong Bay one-day tour is a must-do experience in Vietnam. Roundtrip conformtable bus from Hanoi going by expressway. Standard Boat for travelers on a budget. Have lunch meal with vietnamese and seafood dishes. Visit Suprising Cave - the most beautiful caves in Halong Bay. Swimming on beach and Hiking up mountain at Titov Island. Kayaking/Bamboo Boat at Luon Cave.