Orlando is well known for the many tourist attractions in the area, in particular the nearby Walt Disney World Resort, which is located in Lake Buena Vista about 20 miles (32 km) south of Orlando city limits via Interstate 4. Other notable area attractions include SeaWorld and Universal Orlando Resort. The region sees an estimated 52 million tourists a year. Orlando has the second largest number of hotel rooms in the country (after Las Vegas, Nevada), and is one of the busiest American cities for conferences and conventions with the Orange County Convention Center, the country's second largest in square footage. It is also known for its wide array of golf courses, with numerous courses available for any level of golfer. Despite being several miles away from the main tourist attractions, Downtown Orlando is undergoing major redevelopment with a number of residential and commercial towers.