Hospital Cave served both as a secret, bomb-proof hospital during the American War and as a safe house for VC leaders. Built between 1963 and 1965 (with assistance from China), this incredibly well-constructed three-storey feat of engineering was in constant use until 1975. The cave is about 10km north of Cat Ba Town on the road to Cat Ba National Park entrance.

Cruises, Sailing & Water Tours activity

Overnight 4-Star Halong Bay Cruise


A guide (most know a few words of English) will show you around the 17 rooms, point out the old operating theatre and take you to the huge natural cavern that was used as a cinema (and even had its own small swimming pool).