A €15 billion project to link the capitals of Finland and Estonia via a tunnel beneath the Baltic Sea will create a metropolitan area "much, much better" for tech startups than Silicon Valley, according to CEO Peter Vesterbacka. More
Fort Lauderdale has voted to approve a proposal from Elon Musk's tunnelling firm Boring Company to build an underground transit loop connecting the downtown part of the Florida city to its beachfront. More
The 1.7-kilometre Stad Ship Tunnel, which will have a pair of stone entrances designed by Snøhetta, has been given the green light and construction is now set to begin in 2022. More
Penda China has built three glazed aluminium-clad entrance canopies to the Haikou Wenming East Road Tunnel in Haikou City, China. More
A road tunnelling through mountains in South Tyrol has been given undulating concrete portals and sculptural chimneys of weathering steel by MoDus Architects. More
A derelict house in London that had tunnels dug under it by the infamous Mole Man has been restored and adapted by architect David Adjaye for the artist Sue Webster. More
Elon Musk has driven a Tesla through his Boring Company's test tunnel in Los Angeles County, in the first public demonstration of what he hopes will form a congestion-beating new subterranean transport solution. More
Elon Musk's infrastructure firm The Boring Company has revealed plans to bring its super-fast tunnel system to Chicago, where "autonomous electric skates" travelling up to 150 miles per hour will link the city's Downtown area with O'Hare Airport. More
Entrepreneur Elon Musk has been given written permission to begin digging a transportation tunnel in Washington DC, which could eventually facilitate a 29-minute journey between the capital and New York City. More
A tunnel formed from bright pink partitions and a giant paper aeroplane are some of the temporary urban interventions to be spotted around Quebec City. More
Elon Musk has revealed a plan for easing city congestion that would see an underground network of tunnels transporting cars on high-speed skates travelling at 130 miles per hour. More
Snøhetta has designed a pair of grand stone arches for the entrance points of a 1.7-kilometre shipping tunnel, which will cut through a peninsula to bypass a particularly dangerous stretch of Norway's coast. More
Bubble-wrap partitions reveal the former layout of a derelict west London hotel as part of an installation by UK artist Michael Iveson (+ slideshow). More
London Design Festival 2015: holes cut out from vertical sheets of coloured acrylic form a tunnel designed to distort perspective across a bridge in the V&A museum (+ slideshow). More
News: architecture firm Gensler wants to repurpose London's abandoned tube tunnels to create a subterranean network of pathways that generate electricity as people walk and cycle through them. More
British architect Simon Astridge has added a leather-lined dressing room as part of a refurbishment of a London house (+ slideshow). More
Japanese architect Kotaro Horiuchi cut out profiles of gabled houses from large sheets of paper to create a tunnel inside a university gallery, forming the third installation in his Fusionner series (+ slideshow). More
A concrete tunnel slices through the base of this Tokyo house by Japanese architect Makiko Tsukada, creating a round hole in the facade that reveals the underside of a staircase (+ slideshow). More
People could immerse themselves in a huge fabric cocoon at this interactive installation by architect and artist Sophia Chang (+ slideshow). More
A mysterious dark tunnel leads into the boardroom of these offices in London by architects Studio Octopi (+ slideshow). More
