The city’s long-awaited second underground line is a riot of colour, with psychedelic signage by the father of Polish abstract art, Wojciech Fangor

An underground repository where nuclear waste will be buried is under construction in Finland. Liam Young talks to Michael Madsen, who has made a documentary, Into Eternity: A Film For The Future, about the controversial facility and its legacy

For the past 12 years, the Pritzker laureate has been working on a cluster of museum buildings that lead to a disused zinc mine in a remote part of Norway. Christopher Turner visited the construction site in Almannajuvet to learn why it has taken so long

The BIG founder broke the competition rules to win the Danish Maritime Museum in Helsingør. But the finished project, an “invisible icon” mostly concealed behind the walls of a dry dock, suggests that the notorious architectural prankster may be growing up, writes Owen Pritchard

Joseph Bazalgette’s subterranean network did more than prevent epidemics and reduce the city stink – it fundamentally altered the relationship between the individual and the modern metropolis, says Barbara Penner

Icon’s latest issue brings you designs made in lava by Formafantasma, a building in a disused zinc mine by Peter Zumthor, Bjarke Ingels’ subterranean museum and much more. Read a full list of contents and subscribe to the magazine here