<human>:  When was the first Ferris Wheel built?
<bot>: The first Ferris Wheel was built in 1893 for the World’s Columbian Exposition in Chicago. It was built by George Ferris, Jr., and was a huge hit. It was a huge wheel with a diameter of over 100 feet, and it could hold up to 1,000 people. It was the largest Ferris Wheel in the world at the time.