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Grotesquely Polluted Landscapes ... or Beautiful Art?

Photographer David Maisel has a knack for capturing the beauty and the horror of contaminated mines and toxic lakes.

The Completely Puzzling Relationship Between City Population and Parks

Why do some cities – and neighborhoods – have so much more "urban nature" than others?

Symbols Worth Saving: The Best #CityReads of the Week

Our weekly roundup of the most intriguing articles about cities and urbanism we've come across in the past seven days.

Lost Treasure of the Day: Edmonton's Streetcar Bookmobile

How good things once were!

A 'Pedal-Powered Popemobile' for Pope Francis

There's "no excuse for the big man to always roll in an SUV," says the inventor of this eco-friendly holy tricycle.

At Least We Have a LEGO Version of the Berlin Airport

A scale model of the troubled airport project was completed before the original.

Could Earth's Population Peak in 2050?

Spanish researchers are making the case that the world will in fact be less crowded in 2100 than it is now.

6 Hyper Exotic Urban Gardens

A surprisingly large number involve cars.

The Painfully Obvious Punishment We Should Impose on Cops Who Shoot Innocent People

Take away their guns. Forever.

Lessons From Silicon Valley's 'Downtown'

A new report from SPUR traces the decline of downtown San Jose.

The Fascinating Design Challenges of Building Cities Out of Chewing Gum

Gum architecture doesn't stand the test of time, but that's what Jérémy Laffon likes about it.

Don't Worry About Kids and Touch Screens, Worry About the Parents

Smart phones can help manage the tedium of parenting. But they also isolate us from a lot of the joy.

The Nuclear Option for Rude Subway Riders: Wearable Speakers

It's about 100 times worse than listening to music without headphones.

4 Out-There Designs to Cut the Carbon Footprint of Heated Sidewalk Cafés

SolarFloors, Urban Parasols and infra-red under-table heating.

Minneapolis Bike Riders Targeted With Sticks, Rocks, Molotov Cocktail

The Midtown Greenway has been the site of many high-profile attacks on cyclists.

Challenge of the Day: Three Words to Describe New York

Shorter city pride.

It Took 600 Hours To Assemble This 'Manically Detailed' LEGO City

Mike Doyle's model uses 200,000 LEGOs; it's the first in a series of thematically-linked works.

America's Most (and Least) Religious Metro Areas

Provo, Utah, and Burlington, Vermont, represent opposite ends of the U.S. religiosity spectrum.

Watch This Captivating Aerial Video of San Francisco

Swooping shots from extreme sports photographers.