With over 60 per cent of the world’s population living in cities, the networks beneath our feet – which keep the cities above moving – are more important

Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art contains the contributions presented at the World Tunnel Congr

Montréal’s underground city is one of the most famous of the world, attracting millions of tourists specifically to discover the secrets of the underground c

A highly original work that deals a shattering blow to all our preconceived notions about our past and human origins. Worldwide legends refer to giant flying li

A freelance writer with a background in engineering, construction, and manufacturing, Hall surveys some of the many underground buildings in the US and examines