You can’t air condition the outdoors—but you can lower the temperature with some thoughtful landscaping decisions. If you ...

Hidden beneath the earth, surrounded by nature, lies a masterpiece of primitive engineering. In this video, we build a fully ...

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.

A hike through miles of abandoned train tunnels along the Donner Pass near Lake Tahoe is like visiting a graffiti art gallery ...

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 ...