Across continents and centuries, cultures have passed down legends of a mysterious underground world—an advanced and hidden civilization said to exist deep within the Earth. These stories speak of ...

We know the Earth is not hollow. While we enjoy the occasional escapism from Jules Verne and Warner Bros., there is nothing beneath our feet but kilometers upon kilometers of lava, rock, gas, high ...

Set in central Turkey’s otherworldly Cappadocia region, this year’s iteration of the Echoes From Agartha festival continued to tell its elusive story. The festival is based on the mythical underground ...