Interested in going to the ends of the Earth to help save the planet? Or perhaps just a beach in Hawaii or an animal preserve in Costa Rica? In honor of Earth Day, the travel experts at Cheapflights.com, the leader in finding and publishing online travel deals, have pulled together their picks for 10 destinations to make a difference: top ecotourism impact spots with a line-up of hands-on, inspiring opportunities to play a role in protecting the planet. And, to keep us all treading more lightly when we travel, Cheapflights.com has also compiled a list of essential eco-travel tips with small steps that travelers can take to help make bigger strides in protecting the planet.