With Earth Day this Sunday and the recent launch of our new eco-friendly hotels and resorts collection, we’ve got green on the brain. Echoing that, here’s an all earthy web round-up to take you into the weekend.

Get pampered the green way at one of 10 best sustainable spas in the U.S. (five of which—Carmel Valley Ranch, The Ritz-Carlton Charlotte, The Setai, Calistoga Ranch and Sonnenalp—are Kiwi Collection properties). – Organic Spa Magazine

Five of the greenest cities in the world. – Huffington Post

More eco by the numbers: a dozen Earth Day essentials. – Style.com

In Banff, wildlife have their own highway overpass-cum-runway. Look out for Lynxes striking poses. – Calgary Herald

Coinciding with Earth Day, April 21-29 is National Park Week in the U.S. and that means all 397 parks are offering free admission. – National Geographic Intelligent Travel

A Berkley-based green home decor store is hitting the road to sell eco-friendly wares out of an Airstream, starting at the Earth Day Festival in Santa Barbara and ending up in Austin, Texas. – Los Angeles Times

Speaking of road trips, taking one of KBB’s picks for best green cars will save fuel and Mother Earth. – NY Daily News

No trips into the wild planned this weekend? Take a point-and-click photographic journey through nature. – 1x.com

Photo: “Tired” by Sergey Kokinskiy