City & Urban

These are America's 10 most sustainable cities

World's largest bicycle parking garage unveiled in the Netherlands

Ritzy San Francisco street sold to the highest bidder (and what a bargain!)

Singapore tests glow-in-the-dark walking trails

This bridge broadcasts the mood of Montreal

A dip in the Seine will soon be possible

Soar above London along the world's fastest urban zip line

10 of the world's most colorful cities

Our nation's capital is rich with fountains, but why are so many bone dry?

9 not-so-big cities with rich cultural scenes

I harvested fruit in the middle of New York City

America's mayors are the renewable energy champions we need right now