WORKCAMP is volunteer project aim to protect and help develop the natural and cultural resources of a region. They encourage volunteers of all nationalities to work on a group project benefitting the environment and/or heritage protection – such a description one can find on the Internet (e.g. : polish website workcamps.pl).
I was involved in volunteering in secondary school. Since than I've done 6 workcamps - five in Spain and one in Greece. The camps are great opportunities to enrich experience in working in an international team and learn practical skills. It also gave me a chance to travel and meet different cultures (also known as volunturism)