South America has fallen on hard times, volunteering in this region improves the lifes of those in need.
Option One: Search
Option Two: Browse
Visit the following organizations offering volunteering opportunities in South America:
Global Vision International (GVI) - Provides over 50 Volunteering opportunities in more than countries including community development projects, teaching English as a foreign language, wildlife rehabilitation programs, marine conservation expeditions and much more. GVI also run a variety of courses to help you with you volunteering experience including language and TEFL courses.
i-to-i International Projects - Provides a variety of volunteer work experiences including teaching English as a foreign language, community development, conservation, construction, and free TEFL training.

VolunteerSouthAmerica.net - Free and Low-Cost volunteer work in South and Central America.
Global Volunteers - Sends teams of volunteers to work on short-term development projects worldwide. Coordinates over 150 teams per year. Trip information and contacts for Minnesota non-profit organization.
Amizade Volunteer Vacations - Provides community service, and encourages collaboration worldwide.
Volunteers for Peace - Offers over 2400 affordable short-term volunteer aboard opportunities abroad in 90+ countries.
Iko poran - Offers international volunteers abroad programs in Brazil. Focused on community development programs.
Cross-Cultural Solutions - An international volunteer abroad program, with opportunities in Brazil, China, Costa Rica, Ghana, India, Peru, Russia, Tanzania, and Thailand.
Amigos de las Americas - Creates volunteering abroad opportunities for young people to excel in leadership roles promoting public health, education and community development.
Peace Corp - Peace Corps volunteers travel overseas and make real differences in the lives of real people.
Habitat for Humanity - Habitat for Humanity International is a nonprofit, nondenominational Christian housing organization.
CENIT - Center for the Working Girl - Nonprofit NGO in Quito, Ecuador providing a variety of educational, vocational, and health services to working girls and their families. Information on programs, long-term follow-up, and volunteering.
Fundacion Brethren y Unida - NGO based in Ecuador working on rural development and volunteer projects in agro-ecology, environmental education and small business development.
Fundacion Zoobreviven - Ecuador conservation organization preserving cloud forests and running community projects. Volunteer projects in reforestation, organic and coffee plantation farming, plant and tree study, bird, mammal, insect study in the Alto Choco bioregion.
Genesis Voluntary Teaching Program - Seeking volunteers to teach English to children in Ecuador coast. Information about the town, Bahia, and about volunteering.
Rainforest Research - Looking for volunteers to help with conservation and research projects at a remote research station in the Amazon basin, South East Peru. Volunteers can choose to take part in a range of projects depending upon their background, interests and experience. Photos, links, research and volunteer placement information.
Teaching English in Peru - Offers people the chance to teach English in Peru with the aim of using native English speakers to assist Peruvian students and teachers.
Earthwatch Institute - An international non-profit organization supporting scientific field research and offering members of the public the opportunity to work with distinguished field scientists.
ProWorld - Offers profound 2-26 week cultural, service, and academic experiences in the Sacred Valley of the Incas, the Peruvian Amazon, and the Caribbean coast of Belize.
Foundation for Sustainable Development - Offering several different service projects, a trip to the cloud forest in northern Nicaragua, and a trip to the beach on the Pacific ocean.