Explore More Than 3,000 Miles of Tunnels Beneath Montreal

Andrew Emond, a Montreal-based photographer, amateur geographer, and DIY gonzo spelunker of the city's sewers and lost rivers, has just re-launched his excellent website, Under Montreal. The revamped site now comes complete with a fascinating, interactive map of the city's subterranean streams, documenting Montreal's… » 3/04/14 11:31pm 3/04/14 11:31pm

Hong Kong engineers want to expand the city by building parts of it…

While other cities grow by building out or up, Hong Kong is looking to increase its usable space by building down. An urban planning initiative is exploring the possibility of burying some of the city's more unsightly facilities underground, freeing the above-ground land for future development. » 3/25/12 1:00pm 3/25/12 1:00pm