A secret tunnel discovered last week on the U.S.-Mexico border will be sealed by Mexican authorities, an army official in ...

Urban planners from Mexico City to Toulouse are adopting the high-flying mode of transit. Will it catch on elsewhere?

It’s long been rumored that a network of old, underground tunnels lies beneath Cusco, Peru, the capital of the ancient Incan ...

While public access is limited, tour groups like Cartwheel Art Tours offer insight into the city's underground past. Unlike the tunnels of Las Vegas where the homeless people of Sin City live ...

The hypothetical tunnel between the U.S. and the UK has been branded as a "high-risk" project by one of the world's leading megaprojects economists.

In fact, the Great Smoky Mountain National Park is so well-loved that it is actually the most-visited national park in America ... this abandoned tunnel near Bryson City seems to abruptly end ...

"All this is being uncovered online as the city of NY is ... baby high chairs in your tunnels... I’m gonna clear the whole Shul out tonight. We don’t do that in America.” ...

Archaeologists Jorge Calero and Mildred Fernandez told a press conference that three further branches of the tunnels were detected, with each leading to different areas across the city.

Colombia opened South America’s longest road tunnel, the Tunel de la Linea ... time and cost of moving goods from the Pacific port city of Buenaventura to the centre of the country.