Urban Planning

This snug medieval lane is one of the narrowest streets in the world.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

An oversized, oddly designed pedestrian overpass has drawn comparisons to a commode for pachyderms.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A hidden alley in urban Baltimore is a haven for graffiti artists.

A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

New Plymouth, Idaho is the only U-shaped town in the United States.

Hidden in a metro shop under a shopping mall, this small museum tells the story of one of the world's largest urban transit systems.

The world’s largest digital waste dump has become a site where organized criminals hack into confidential government data.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.