urban design of underground tunnels
DESCRIPTION
Underground tunnels are made for different purposes like sewage system, to support foundation of structures and for other maintenance purposes. Thanks to a group of urban explorers who found out these architectural marvels which were beneath the street’s and cities of the world hidden from the reach of people.TRANSCRIPT
Urban Design
10 Scariest Underground Tunnels (http://smoont.com/10-scariest-underground-tunnels/)
Underground tunnels are made for different purposes like sewage system, to support foundation of structures and for other maintenance purposes. Thanks to a group of urban explorers who found out these architectural marvels which were beneath the street’s and cities of the world hidden from the reach of people.
