American Museum of Natural History Expeditions
Designed for those who yearn for an in-depth educational experience, these special small-group tours are led by AMNH and other world-renowned scientists and educators.
Juneau, AK : Everglades, FL : MS : Antarctica : Australia : Botswana : Brazil : Patagonia, Chile : Silk Road & Yangtze River, China : Costa Rica (... more)
International Bicycle Fund
Cross-cultural bicycle tours of moderate difficulty. Focus is on meeting people, & learning their culture, social institutions, environment, history, economy, &...
WA : Africa : Benin : Botswana : Cameroon : Canada : Cuba : Ecuador : Ethiopia : Ghana : Guyana : Korea : Liberia : Malawi : Mali : Morocco : Namibia (... more)
Natural Habitat Adventures
Kenai Fjords & more, AK : Grand Canyon, AZ : Glacier National Park, MT : Zion, Bryce, UT : Yellowstone, WY : Antarctica : Argentina (... more)