What you don’t know: where the other end is, who’s in it, what they’ve left behind. Is it booby-trapped? Is it big enough for a person to walk through? Is the air quality lethal? Who’s on the other ...

John Leguizamo journeys into the tunnels beneath the great pyramids of Teotihuacán. Teotihuacán was the great capital of Mesoamerica, and one of the cradles of Western Civilization. Alongside ...

The Detroit Windsor Tunnel is nearly 100 years old and was the first and only underwater tunnel for vehicles connecting two countries. But, there is much more to that tunnel than what people see when ...

The underground tunnel system of Hukok in Lower Galilee provided escape for Jews revolting against Roman rule. A team of volunteers also recently discovered a stash of 22 deliberately hidden—and ...

Imagine walking through a tunnel where every step surrounds you with vibrant blossoms, soft petals, and the sweet fragrance of flowers. These stunning blossom tunnels , formed by nature or designed by ...

CINCINNATI (ENQUIRER) - The city of Cincinnati never finished building its subway in the 1920s, a decision that has long been second-guessed. The subway tunnel not only sits empty but costs city ...

The Israeli military said it is the largest underground passageway, about 2½ miles long, that they have found so far built by Hamas in Gaza. WSJ’s Dov Lieber reports from the Israel-Gaza border, ...

Beneath Paris’ grand boulevard lies a hidden history filled with buried secrets, ancient passageways, and forgotten worlds. For adventurous travelers and history enthusiasts alike, these underground ...

Workflow of the proposed explainable modeling framework for metro tunnel inspections using backpack SLAM LiDAR. The pipeline integrates field experiments with varying operational factors, point cloud ...