As one of the world’s most visited tourist destinations, Orlando’s famous attractions form the backbone of its tourism industry. The two most significant of these attractions are Walt Disney World, opened by the Walt Disney Company in 1971, and located approximately 21 miles (34 km) southwest of Downtown Orlando in Bay Lake; and the Universal Orlando Resort, opened in 1990 as a major expansion of Universal Studios Florida. With the exception of Walt Disney World, most major attractions are located along International Drive with one of these attractions being the famous Orlando Eye. The city is also one of the busiest American cities for conferences and conventions; the Orange County Convention Center is the second-largest convention facility in the United States.