The San Francisco Bay Bridge, a marvel of engineering when it was constructed in the 1930s, is now crumbling and unstable. As construction teams work on replacing it with another bridge, architects suggest ways the abandoned span could be reused.
The worlds of the fantastical are full of recurring themes and strange ideas, and we love to find patterns in the chaos. Here are our 10 greatest lists from 2009.
Dubai isn't the only city to see extravagant architectural projects fall by the wayside. Many of New York's more ambitious concept buildings, including a Frank Gehry-designed museum and this sky-high series of individual townhouses, also failed to materialize this decade.
London is currently auditioning ideas for a new tourist attraction as part of the 2012 Olympics. On the shortlist is MIT's digital Cloud, a self-sustaining observation deck made of transparent bubbles that broadcast information to viewers below.
Many of Boston's most ambitious and expensive construction projects have stalled out, leaving behind unsightly construction sites. The Boston Globe has asked architects for their ideas for making the sites more useful and attractive.
What will the New Yorks, Londons, and Tokyos of tomorrow look like? Will they be technological Edens, grim dystopias, or entirely obliterated? We look at science fiction's take on the future of today's cities to gauge our urban future.
Belgian comic book artist François Schuiten is famous for creating rich and fantastical cityscapes, with shades of steampunk and Art Nouveau, envisioning a future dominated not by faceless office buildings, but by romantic and innovative architecture.
Powered by ocean currents and geothermal technology, an imagined tunnel spanning the Bering Strait lets you travel from Alaska to Russia while enjoying rich underwater views and the hospitality of a city built beneath the sea.