The penny-farthing is a type of bicycle that was popular in the late 19th century. It features a large front wheel and a smaller rear wheel, which gives it a distinctive appearance. The large front wheel allows for greater speed, while the smaller rear wheel makes it easier to maneuver. Riders of the penny-farthing sit high above the ground, which can make it challenging to mount and dismount. This unique design was eventually replaced by the more modern safety bicycle, which has two wheels of equal size, making it safer and easier to ride.