Childhood fun for adults.
Think beach chairs, scooters, and other junk just lying around.
This prototype "green" e-cycle can creep forward on the power of the sun alone, no battery required.
The Rube Goldbergian "mobile foundry" smelts aluminum cans into helpful objects for your butt.
You can make your own wood-and-leather heels that clip into the pedals following this eight-step process.
It was paved in broken concrete, overgrown with weeds, and strewn with broken glass. In other words, it was the perfect urban recreation space.
Some of the best images on Google Earth, brought to you by random people.
What better way for cyclists to show their contempt for the car-driving masses than riding around on the carcass of a dismembered vehicle?
Design firm Street Plans Collaborative has started tracking informal street furniture, and you can help.
Kings of the playground.
Originally hailed as a death trap, the jungle gym has now become a beloved part of Moscow.
It's a Monty Python gag, of course.
The exiting Wired editor-in-chief explains why the maker revolution is becoming the new industrial revolution.
Bamboo trains are apparently a relatively common sight in rural Cambodia.
Not much, according to one urban hactivist, as long as you've got some white tape and shopping carts.
A Toronto photographer tracked the same addresses over four decades to tell his city's changing story.
A sociologist and an urban historian document the community activism reshaping some of the cities hardest hit by the great recession.
Can cities make it just as easy for citizens to engage in the physical world as the digital one?