Notable for its perfect circular design, Restormel Castle is one of the oldest and best preserved Norman motte-and-bailey castles in Cornwall

Before Radar, they used these giant concrete “Sound Mirrors” to detect incoming enemy aircraft

Locals believed that the Angkor Wat temple was constructed in a single night by a divine architect

Djémila: Аncient city in Algeria which is one of the best-preserved Roman ruins of North Africa

Rabbit hole in farmer’s land leads to a network of caves reportedly used by Knights Templar

The 10,000 room Nazi resort complex without a single guest ever accommodated

New York’s & Chicago’s Massive Graveyards of the Past

Now Abandoned: New York’s First Airport built in mesmerizing Art Deco Style