Cycling varies significantly. It can be an off-road dirt-track or it can be cycling over the Alps. In races such as le Tour de France, cyclists literally cycle across countries. Certainly downhill mountain biking induces quite an adrenalin rush.
I think that adventure can be made out of pretty much anything with energy, activity and enthusiasm.
James. (18.104.22.168 11:25, 7 June 2009 (UTC))