A major new mine shaft at Newmont’s Tanami gold mine in the Northern Territory is expected to take operations to a new level ...

When seawater penetrates concrete in road tunnels, a biofilm is formed that breaks down the concrete. This can lead to high ...

Victoria Vale said the mysterious door "seemed like it hadn't been opened in a very long time," and she was determined to figure out what was behind it.

Since 2014, researchers studying the Oslofjord tunnel have observed that bacteria can erode up to one centimeter of concrete annually. When a saltwater intrusion occurs, biofilms ...

A man and woman were shot Saturday night near the K Street tunnel that connects Old Sacramento and the Downtown Commons.

Israeli hostage Iair Horn on the urgent fight to bring his brother Eitan home from Hamas captivity and the conditions he ...

Deep in the Appalachian foothills of southeastern Ohio lies a brick-lined portal to another time—and possibly another dimension. Moonville Tunnel in McArthur stands as a moss-covered monument to a ...

Helen’s Bridge in Asheville, North Carolina isn’t just a picturesque piece of historic architecture—it’s a portal to the paranormal that has locals and visitors alike both fascinated and terrified.

National Geographic Explorer Paul Salopek has covered a lot of ground: some 14,000 miles — on foot — through 21 countries so ...

Today, the former Homestake Gold Mine, a 300-mile (480-kilometer) tunnel system carved inside the mountains, houses the ...

The massive underground infrastructure project stretches nearly five miles from Glasgow Avenue to Foster Park, sitting 220 ...

The stone-walled passages are up to three metres high and were built to withstand cannon fire and other attacks common in ...