Some people are bored with sightseeing trips. They don't want to be tourists. They prefer an adventrue a surprising and exciting trip. They want to learn something and maybe help people, too. How can they do this? Some travel companies and environmental groups are planning special adventures. Sometimes these trips are difficult, but they're a lot of fun. One organization, Earthwatch, sends small groups of volunteers to different parts of the world. Some volunteers spend two weeks and study the environment. Others learn about people of the past. Others work with animals or plants.