Far below the surface of Mexico’s Yucatán Peninsula, a flooded labyrinth of limestone tunnels has quietly guarded one of the most haunting fossil troves of the Ice Age. In the darkness of a submerged ...

Workers in China have set a new record by completing the task of building the world's largest-diameter underwater shield tunnel. The two mile section of the underwater shield segments is completed, as ...

Beneath the idyllic resort towns of Mexico's Yucatan Peninsula, daring explorers have uncovered a hidden world of grand chambers and twisting tunnels. The Ox Bel Ha, Mayan for 'Three Paths of Water', ...

Jinan, a city of 9.4 million people and the capital of Shandong Province in East China, has made world headlines. Crews working there have completed the monumental task of building the world's largest ...

The Fehmarn Belt Tunnel, a €7 billion infrastructure project, is set to become the world’s longest prefabricated road and rail tunnel. Stretching 18 kilometers beneath the Baltic Sea, it will connect ...

Discover the mysterious world of underground rivers. From the record-breaking Sistema Sac Actun to the famous Puerto Princesa ...

Researchers have found a "unique" collection of "cave pearls"—some of which contain archaeological artifacts—in an ancient tunnel, a study has reported. Cave pearls are a type of "speleothem"—a term ...

Every day, long-haul truckers and commuters pass through the George Wallace Tunnel, briefly slipping away from daylight and 40 feet underwater, until reemerging into downtown Mobile, Alabama. Since ...

Spain has begun investigating the possibility of connecting Europe to Africa via an underwater tunnel to Morocco. On Saturday, the Spanish government allocated €1.6 million (roughly $1.7 million) to a ...

Every day, long-haul truckers and commuters pass through the George Wallace Tunnel, briefly slipping away from daylight and 40 feet underwater, until reemerging into downtown Mobile, Alabama. Since ...