Looking for a unique travel experience? Make a difference in some of the world’s most critical conservation and community projects with Global Vision International and selected partner organisations.Global Vision International have a large number of expeditions, projects, and courses you can join, from anywhere between 2 weeks and 2 years.
This list has a number of "Another Chance To See" related projects.
If anyone is able to join one of their programs, don't forget to report back on how you got on...