When it was first built in 1927, the Hilton Chicago, or the Stevens Hotel as it was formerly known, was the largest hotel in the world with more than 3,000 rooms, a five-lane bowling alley and an 18-hole golf course. It even had an in-ground railroad that carried coal and ash. Hilton acquired it 20 years later and had a stream of VIP guests visit. In 1959, the hotel entered the Guinness Book of World Records for hosting the largest known dinner with 7,200 people.