Green River, Utah
Will Steger launches a new Arctic dogsled expedition to put global warming on the world's front burner
Why jet to exotic reefs when home waters boast spectacularly diverse diving?
Springs of the Suwannee River Basin & Resurrection Bay
Yellowstone Lake, WY; Lanai Island, HI; & Acadia
South Africa's Mike Horn is circling the Arctic by land and by seawith no engines allowed