Nearly 21 years ago, Patty Webster landed her dream job as an adventure tour guide in the Peruvian Amazon. But as she shared the area's beauty and culture with tourists, she realized there was a darker side to the rainforest paradise. I saw how poor they were and realized that people were dying because they didn't have medical care," Webster said. She started sharing her supplies with the locals and soon began waking up to find people waiting outside her mosquito net to ask her for medicine. At one point, Webster -- who had no medical training -- gave someone stitches, following instructions from a book. Since 1993, Webster has been bringing medical relief to some of Peru's poorest and most remote areas through her nonprofit, now known as Amazon Promise. Webster ... and her volunteers have provided free health care and education to more than 55,000 people. Today, she runs Amazon Promise from Iquitos, considered the most populous city in the world that can't be reached by road. It's in the northeastern corner of the country, in the middle of the rainforest, and is the capital of Peru's largest and most remote region. She organizes several expeditions to these underserved areas every year. Each trip is staffed by adventure-seeking medical volunteers from the West -- often from U.S. medical schools -- and Peruvian health professionals. A traditional shaman, or healer, frequently accompanies them.

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