Charley Boorman and Ewan Mcgregor went on a trip around the world by motorcycle (BMW R1200 GS) in 2004 and made a nice documentary (The long Way Round) about it. Two years later they went from Scotland to Capetown (The Longway Down) straight through Africa. These are very nice series to watch, because it is about struggle, friendship and...uh.. motorbikes :-)