The city has been celebrated as an international model. Naturally, it's time for a backlash.
Themed for-profit road races like the Color Run are proving to be a challenge for many cities to manage.
The birthplace of the car-free day saw 296 deaths on city streets last year.
You don't need a wealthy developer when you've got thousands of small investors.
The TransMilenio is among the world's best networks, but that hasn't stopped residents from protesting it again and again.
Five highways whose execution gave their cities new life.
An urban escalator opens in hilly Medellin slum
With the current mayor in jail, a transit-building former mayor is among the election's front-runners