One of the most innovative, crazy and exciting projects (and teams of people) I have come across in a long while is Mission Explore.
The idea is to inspire, take part in, record and communicate as wide a variety of missions into the outdoors as possible. Some of these are themed, some progressive, some challenging, some creative, some totally mad !
Go visit the Mission Explore site: http://www.missionexplore.net/ – get together with some friends – start and complete some missions of your own. Some missions have strong links to curricular learning particularly for secondary schools. Creative, playful and adventuresome learning at its best !