In the video, a slew of celebrities share their favorite "pieces of America," like Yosemite National Park (Corbin Bernsen), Brooklyn Bridge Park (Mayor Bloomberg), Big Sur (Laura Prepon) and the redwood forests of Northern California (Kristin Bauer).
Beyond "celebrating the mountains, deserts, grasslands, forests and whitewater rapids that make up the great outdoors," the Sierra Club is also encouraging Americans to spend more time outdoors and fall in love with nature, in the spirit of their founder John Muir.
This year's Earth Day comes as deforestation remains a problem around the world. Forests in Brazil and Malaysia were destroyed at alarming rates earlier in 2011, although Amazon rainforest destruction rates dropped later in the year.
Do you have a place in America that you love? Check out what the celebs had to say above, then share your favorite piece of America with Sierra Club and in the comments below. Or, tweet it to us @HuffPostGreen!