After centuries of speculation, archaeologists in Peru have confirmed the existence of an underground tunnel network, thought to have been built by the Incas. The groundbreaking discovery was ...

The existence of a tunnel network under the ancient Peruvian city of Cusco had been rumored for centuries. At times stretching more than a mile, the labyrinth connected the Temple of the Sun to ...

The Tulsa Foundation for Architecture is gearing up for its bi-annual underground tunnel tours on Feb. 8 and Aug. 9. The tunnel tours allow people to walk where history was made. A network of ...