In November 2008, Briton Joff Summerfield completed a 22,000-mile round-the-world trip on a penny-farthing. Summerfield spent two-and-a-half years cycling through 23 countries, taking in sights such as the Taj Mahal, Angkor Wat and Mount Everest.

Joff had a love of riding the penny farthing and combined it with his other love of travelling around the world.  He used to work in Formula One making engines for racing cars. So when he had some free time on his hands, he decided to do what he loves.

The penny-farthing, also known as a high wheel, high wheeler and ordinary, is a type of bicycle with a large front wheel and a much smaller rear wheel. It was popular after the boneshaker until the development of the safety bicycle in the 1880s. It was the first machine to be called a "bicycle".

The penny-farthing used a larger wheel than the velocipede, thus giving higher speeds on all but the steepest hills. In addition, the large wheel gave a smoother ride, important before the invention of pneumatic tires.

More Info: en.wikipedia.org