The US government has been secretly digging tunnels for decades, with some speculating that they are being used to hold alien or UFO material.

So, let’s say the worst happens, and Earth gets invaded by aliens. Not the friendly kind offering galactic peace treaties, but the laser-zapping kind.

This landscape was so convincingly alien that Apollo astronauts spent weeks here preparing for moon missions. Can you guess ...

Who would have guessed that in the depths of the English countryside lies an expansive underground operation, with secret ...

Mark Zuckerberg is reportedly building one of the largest private construction projects in human history - a $270 million ...

Think magical caves only exist in fairy tales or far-away places? These 10 caves offer enchanting underground worlds right here in California! 1. Lava Beds National Monument (Tule ...

Publisher indie.io and developer QH Studios have confirmed that Subway Invasion will launch on Steam on April 3.

The purpose-built underground structure in the countryside was designed to protect government officials from nuclear warfare, ...

From Christina Aguilera and Don Toliver to endless lines and wild weather, here are the best and worst moments from SXSW 2026 ...

The Nuclear Bunker was built during the Cold War to protect government officials in the event of a nuclear attack and is now a popular museum ...

At 14,115 feet, Pikes Peak doesn’t just offer a view – it offers a perspective shift. The Broadmoor Manitou and Pikes Peak Cog Railway, departing from 515 Ruxton Avenue in Manitou Springs, is the most ...

The speleologist and astronaut trainer publishes 'The Dark Continent,' a journey through the secrets beneath our feet: "We have to think about inhabited planets underground". Francesco Sauro's story ...