Wear your tweets on your sleeve.
American cyclists are used to dealing with disrespect on the road, but not from elephants.
Philadelphia officials want to combat such painful examples of "distracted walking."
City comes to a halt in honor of an effort to liberate the city from the Nazis in 1944.
An interview with innovative architect Peter Calthorpe.
Rare footage offers a glimpse of the city right after World War I. Compare those with sleek aerial footage from today.
Maybe it could even build structures on Mars.
A new film explores the conflicted relationship between the skater and the city.
Suburbanization and poorly planned infrastructure led to Angkor Wat's metropolitan collapse. Its demise offers an important lesson for today’s cities.
Mayeul Akpovi's cameras travel as they shoot, sliding through the freeze-framed city.
A stunt driver takes a high-speed and action-packed tour of the city.
The head of the environmental program at Bloomberg Philanthropies makes the case in this compelling video.
London's most athletic vermin run the torch in this charming animation.
Watch cars get launched into the air like rockets due to ill-fitting manhole covers.
Ben Jenkin jumps, tumbles and climbs his way through Miami Marine Stadium.
Smart design will reduce heat energy use, electricity use and water consumption.
In the future, urban planners could lose their jobs to ultra-efficient slime molds.
You can set your iPod to blast from a bench in Moscow. Ugh.
There's fun and profit in having giant shredding rotors tear the flesh off deceased vehicles.