Google is celebrating Valentine's Day and George Ferris's birthday with a two-in-one doodle.

Ferris,born on 14 February 1859 in Illinois, is most famous for designing and buildingthe originalferris wheelfor an exposition in Chicago in 1893.

Thedirectors of the World's Columbian Exposition wanted an exhibit that wouldrival or even surpass the Eiffel Tower, which had been built in Paris in 1889,and Ferris's wheel was chosen.

Inrecent years ferris wheels have moved out of amusement parks and into citycentres and they are getting bigger too. The tallest is the Singapore Flyer inSingapore, which reaches a height of 165 metres – 30 metres higher than theLondon Eye.

Thedoodle also celebrates Valentine's Day, using the ferris wheels. On clickingthe heart placed between the arrows, the Ferris wheels stop rotating and thetwo characters pop upleft side-by-side to fall in love at first sight. Thedoodle has as many as 16 features narrating love stories that users can see byhitting that heart-shaped button. Here's a collection of love matches featuredon Google doodle: