Sung Sot Cave, also known as Surprise Cave, is one of Ha Long Bay's most iconic limestone formations. Located on Bo Hon Island, in the heart of Ha Long Bay, this natural wonder offers insight into the region's impressive landscape and ancient geology. The cave’s spacious interior and intricate stalactite formations make it a must-see for those exploring the beauty of Quang Ninh Province. With over 12,000 square meters of space, this expansive cave promises a captivating experience for travelers eager to uncover Vietnam's natural marvels.