Best World Record
The Quebec Bridge is a notable Canadian structure built in 1917. It represents a world record for cantilever-bridge span length at 549 meters across the St. Lawrence River. This road-rail bridge utilized a cantilever truss design to achieve its impressive reach. The bridge’s construction faced signi...
Son Doong Cave is a colossal karst cavern within Vietnam’s Phong Nha-Ke Bang National Park. It represents the world's largest known cave system by volume, boasting immense chambers and underground rivers. Its sheer scale makes it a significant geological formation and a challenging destination for e...
Veryovkina Cave is an Abkhazian karst system renowned for being the world’s deepest known cave. Located within a limestone formation, it achieved international recognition after comprehensive surveying revealed a depth of approximately 2,212 meters in 2018. The cave's significant depth makes it of i...
The Mammoth Cave System represents the world's largest known cave network spanning more than 400 miles through Kentucky’s limestone bedrock. Formed over millions of years by dissolving rock, it showcases exceptional karst topography and geological history. Primarily explored by speleologists, geolog...
The Sarawak Chamber resides within a complex karst system in Gunung Mulu National Park, Malaysia. This immense cave passage is recognized as the largest known underground chamber globally, measuring approximately 80 meters high and 237 meters wide. Its colossal scale makes it a significant geologica...
Dean’s Blue Hole is a remarkable limestone sinkhole located on Long Island in the Bahamas. It represents the world's deepest known underwater cavity, reaching approximately 202 meters (663 feet). The hole’s unique formation and extreme depth make it a significant geological feature and a globally re...
The Sótano de las Golondrinas is a remarkable limestone cave system located in San Luis Potosí, Mexico. This vertical shaft reaches an extraordinary depth of 333 meters making it one of the world’s deepest caves. It's notable for its unique geological formation within karst topography and most famou...
Deer Cave within Gunung Mulu National Park represents an exceptional karst formation in Malaysia. It’s notable for its immense size – one of the world's longest continuous cave passages – and supports a significant bat population exceeding three million individuals. The cave system is primarily lime...
Eisriesenwelt is a vast cave system within Austria’s Werfen region. It features extensive passages carved by meltwater through limestone formations, creating spectacular ice caves. This is the world's largest accessible ice cave with over 40 kilometers of explored routes. Geologists, speleologists,...
Sistema Ox Bel Ha is an extensive underwater cave network located in Quintana Roo, Mexico, near the Caribbean coastline. The system is characterized by its submerged limestone passages that are accessible through coastal sinkholes known as cenotes. Continually explored by cave divers, it ranks among...
Majlis Al Jinn is a large underground chamber in the limestone of Oman's Selma Plateau. Its floor is reached through natural openings in the ceiling, historically requiring a long free-hanging rope descent rather than entry through a horizontal cave passage. The chamber was documented by explorers i...
Xiaozhai Tiankeng, located in Chongqing, China, is a massive collapse sinkhole known as a tiankeng. Measuring approximately 662 meters deep and 511 meters wide, it is recognized as one of the largest and deepest sinkholes in the world. The depression was formed by the continuous collapse of a subter...
Mission Hills Haikou is a golf resort complex on Hainan Island, China, developed across terrain formed by ancient volcanic activity. It contains multiple courses designed by Brian Curley and occupies part of a larger resort with hotels, leisure facilities, and event venues. The complex is intended f...
