This prehistoric underground complex takes the cake for the most musical ancient city. Dating back to 4000 ... of Chaco Canyon took underground architecture to spiritual heights with their ...

AN ANCIENT underground labyrinth city with its own advanced water system has been discovered after researchers stumbled across it in a garden. The sprawling network of twisting passages was found ...

The main branch is more than 5,700 feet long, according to the report, and was made by digging a trench underground ... to the city, and the rebuilding era brought a new style of architecture ...

Researchers believe that the tunnel system was an underground representation of the above-ground street network of the ancient Incan city of Cusco. Located about 130 miles from Machu Picchu ...

When the city of Naples embarked on a landmark infrastructure project to commission a series of new stations for its metropolitan train line in 2004, it used the triptych ‘art, architecture ... down ...