Below are some useful websites for vacation and travel planning.

Consumer Reports Guide to Vacation & Travel – Here are some tips to make your next trip easier, and save money at the same time.
Earthwatch  These expeditions pair researchers with volunteers to address some of the world’s most pressing environmental challenges. Explore our current expeditions to discover how you can make a difference.
Ecotourism The International Ecotourism Society (TIES) is a nonprofit organization dedicated to promoting ecotourism. Founded in 1990, TIES has been on the forefront of the development of ecotourism, providing guidelines and standards, training, technical assistance, and educational resources.
Lonely Planet – Online home for Lonely Planet, which aims to inform and inspire travelers with trusted content from experts who visit destinations across the globe.