Kracow - Vienna - Prague: Eastern Europe is an up-and-coming motorbiking destination, with this 13-day trip from Cameron Tours currently a favourite.

Then, with a friend he'd met in law school, Brad Keywell, Lefkofsky bought a Wisconsin company called Brandon Apparel Group.

Poland, Czech Republic and Hungary: So popular with European tourists that prices in Krakow, Prague and Budapest have risen. But the countryside in these nations is still very affordable.