In the early 1930s, entrepreneurs established tourist attractions at Rock City and Ruby Falls on Lookout Mountain, perhaps best known for their unique advertisements painted on barn roofs across the southeast. TVA considered the creation of recreational opportunities along its reservoirs a priority, and reservoirs such as Norris Lake and Chickamauga Lake have since grown into hunting and fishing meccas. The agency was also responsible for the creation of state parks such as Big Ridge State Park and Harrison Bay State Park. Knoxville hosted the 1982 World's Fair, which drew over 11 million visitors, making it one of the most popular world's fairs in history. In the early 1990s, the Tennessee Aquarium— one of the world's largest freshwater aquariums— opened in Chattanooga. The Tennessee Aquarium coincided with the revitalization of Chattanooga's riverfront, which helped to bolster the downtown districts. With the downtown districts joining the other attractions located in Hamilton County, the county surpassed $1 billion in tourism revenue, a first for the large cities in East Tennessee. The city has become an outdoor sports mecca, being heralded as the Best Town Ever by Outside magazine.