In
1989, Gunther Holtorf and his wife Christine set out on what was
meant to be an 18-month tour of Africa. 25 years later, with more
than 885,000 km (550,000 miles) on the clock and 177 countries
visited, Gunther is still going. The former airline executive has
travelled the equivalent of 20 times around the planet in the same
vehicle—which he calls Otto.