Sung Sot Cave, also known as Surprise Cave, is the largest and most famous cave in Halong Bay, located on Bo Hon Island. Discovered by French explorers in 1901, the cave is renowned for its two massive chambers, towering stalactites and stalagmites, and multicolored lighting that enhances its dramatic geological features.
Visitors reach the cave via a short hike from the boat dock, ascending stone steps to a scenic entrance. Inside, the first chamber resembles a grand theater, while the second opens into a vast cathedral-like space with formations resembling animals, flowers, and mythical creatures. The cave’s name comes from the “surprise” visitors feel upon entering its unexpectedly vast interior.
Sung Sot Cave is a highlight of most Halong Bay cruises, offering a blend of adventure, natural beauty, and geological wonder. It’s best visited in the morning or late afternoon to avoid crowds and enjoy cooler temperatures.
