underground city

10 incredible underground cities in the world
Stories about people living in mines, caves or abandoned tunnels are not strange stories.
Goreme National Park and Cappadocia rocky area
Unesco's Scientific, Educational and Cultural Organization has recognized Goreme National Park and Turkey's Cappadocia rocky area as a World Heritage Site in 1985.
Unexpectedly discovered a thousand-year-old underground city when repairing a house
A Turkish man while repairing the house accidentally discovered the tunnel leading into the ancient underground city thousands of years ago.
Revealed 'underground city' under the Roman emperor's mansion
Archaeologists have discovered a network of tunnels, forming an underground city, buried deep beneath the mansion of Roman emperor Hadrian near Rome.
NASA announced the most bizarre crater on Mars
The image of the Noctis Labyrinthyus crater, announced by NASA, is believed by many to be the ventilation roof of an underground city on Mars.
The giant ants 'wonder is likened to' Great Wall
According to Dailymail, after discovering a strange ant nest, scientists had to dump 10 tons of concrete and excavate to see the size of the ant nest.