What if you saw the building walls and other urban obstacles around you not as barriers, but as tempting challenges?

This amazing video shows the ways in which people are rethinking urban density.

Check out these urban abandonments of the post-modern world.

The creation of the tallest building in the world has become such a status-seeking quest, cities and countries competing for the title have stopped revealing the planned height of their buildings.

The following seven examples illustrate the fascinating range of Banksy's life and works through his most controversial and compelling projects.

Watch some people create 'LED Throwies' out of simple lithium batteries and paint the town with multicolored lights to a mellow tune.