The plan to tuck a park under Toronto's ugly elevated expressway

Puma returns to rain forest after 20 years in chains

3 reasons why you shouldn't feed bread to ducks

Lions may be in more danger than we thought

Earth gets a surge of new ocean sanctuaries

For a spectacular dose of autumn, try the Porcupine Mountains

Take a dizzying walk on the wild side along the 'High Line of the forest'

Mexico City's oldest road to be blanketed with spectacular urban park

Plan your perfect road trip to a U.S. national park

How would you reclaim the 700 miles of unused 'el-spaces' in NYC?

Raccoon hops onto alligator's back in Florida

Chicago's 606 is a bike-friendly, neighborhood-linking riff on the High Line