Seattle is building one of the country's biggest rooftop planting spaces.
According to research in Pediatrics, active friends can make us more active.
Scenes from around America.
Ever wonder what an airline stowaway sees when peaking out from within his Samsonite sanctuary?
New data points to the economic power of walkable neighborhoods – and the high cost of living in them.
As two projects in Los Angeles show, public art has more than just aesthetic appeal - it can generate income for developers and local government.
Wartime cartography shows how U.S. bombing of Japan shifted from military targets to cities in general.
Can a city reduce the number of deaths to zero?
The model Knuffingen Airport in Hamburg, part of the world's largest railway model, has 40 different planes that take off and land hundreds of times daily.
There's been a lot of human-on-statue violence this week. Could Rush be next?
A 16-city tour of America, from an Amtrak seat.
Once seen as a civic gem, demand for a permanently enclosed stadium has dwindled.
Batman: Death By Design, explores the link between Batman and architecture.
An annual ritual at Arlington National Cemetery.
Believe it or not, a new study of canopy coverage in Baltimore suggests maybe they can.
A cool shift-tilt video captures the city's dynamism.
Cities and citizens are working together to rebuild communities and grow jobs. What comes next?
Found objects become an urban ping pong station in Helsinki.
Spray-painting walls in Beijing isn't actually all that dangerous. So why are there so few people doing it?