Starting in the basement of a home owned by a wealthy philanthropist in the 1700s, a network of tunnels descends into the earth beneath the city of Liverpool, their full extent still undiscovered ...
The remains of large concrete arrows can be found in patches of dirt and grass across the United States from New York to San Francisco. Many locals have wondered what they're for, seemingly ...
What bizarre and terrifying 'treasures' from long-gone ancient civilizations are still hidden in crypts, caves and deep within the earth? Most archaeologists may spend their days painstakingly ...
The only ancient city ever built upon a coral reef, Nan Madol is a marvel of ancient engineering so complex, no one can figure out how it was conceived and built starting in the 8th or 9th ...
A stone monument with instructions for apocalypse survivors, lurking ominously in a field in rural Georgia. A castle comprised of stones that each weigh several tons, built with stunning ...
In certain areas of the United Kingdom, a strange sight awaits those who take a moment to look around. Trees - both living, growing trees and felled trunks - covered in coins dot the landscape. ...
Why would a network of cramped, claustrophobic tunnels emerge into the kitchens of farmhouses, the aisles of churches and the center of cemeteries? No one knows exactly why man-made subterranean ...
Math isn't just mysterious because the majority of us find it so difficult to understand – it's also the basis of the universe, giving us clues to physical phenomena like the motion of gases in ...
(images via: darkf666, qaz2008, paulboutros) Did aliens try to send us a message in 1977? Is some mythical, nightmarish sea monster responsible for the bizarre ocean sound known as 'The Bloop'? ...
From five lines of letters scrawled on the back of a dead man's book to the taunting codes sent to police by the Zodiac Killer, some of history's most legendary uncracked codes and ciphers ...
