"A rare British "skyscraper city" made by ants has been given the equivalent of listed building protection and a place on maps to safeguard it from forestry work. Nests up to two metres (7ft) high, constructed from millions of conifer needles in Northumberland woodland, will be monitored during the felling of "intrusive" 20th century conifers amid the ancient oaks of Holystone, near Rothbury." - Graham Sergeant

Give an industrious community a free supply of modular resources and some simple rules of engagement and you get "Skyscraper City" :D - Graham Sergeant