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Jerusalem and the ancient city walls that once repelled Crusaders and Saracens alike over years of bloody conflict. http://goeco.org/area/volunteer-in-the-middle-east/israel/ecotourism-development-in-central-jerusalem#full-details
Jerusalem is home to holy cites central to many of the world's most ancient faiths. Islam, Christianity, Judaism, and Baha'i all have relics, holy ground, and history here.

Eco-tourism is a concept based on using tourism as a method to promote wellness and knowledge of the local culture, improve conservation efforts of the history or environment, and develop the local area through acts, work, and introducing more money to the local market. GoEco in Jerusalem is one of many GoEco projects that you can choose from around the world that try to help the local area through service and tourism. You can work at a local hostel in downtown Jerusalem helping guide tours, work in a garden, or help the hostel itself. It promotes learning of the culture and service to the community while helping tourists get a great experience in Jerusalem.

http://goeco.org/area/volunteer-in-the-middle-east/israel/ecotourism-development-in-central-jerusalem#full-details

Check it out!