with Valley and Boise Counties) hosted the 2009 Special Olympics World Winter Games. More than 2,500 athletes from over 85 countries participated. In 1972, John Waters set the final scene of his film Pink Flamingos in Boise. Boise's sister city is Gernika, Spain. Major attractions Boise offers numerous recreational opportunities, including extensive hiking and biking in the foothills to the immediate north of downtown. Much of this trail network is part of Hull's Gulch and can be accessed by 8th street. An extensive urban trail system called the Boise River Greenbelt runs along the river and through Pierce Park. The Boise River is a common destination for fishing, swimming and rafting. In Julia Davis Park is Zoo Boise, which has over 200 animals representing over 80 species from around the world. An Africa exhibit, completed in 2008, is the most recent addition. Boise is also home to the Idaho Aquarium. The Bogus Basin ski area opened in 1942 and hosts multiple winter activities, primarily alpine skiing and snowboarding, but also cross-country skiing and snow tubing. "Bogus" is from the city limits (less than an hour drive from downtown) on a twisty paved road which climbs 3400 vertical feet (1036 m) through sagebrush and forest. Boise is the site of the only human rights memorial in the U.S., the Anne Frank Human Rights Memorial, located next to its main library. The World Center for Birds of Prey, just outside city, is a key part of the re-establishment of the peregrine falcon and its subsequent removal from the endangered species list. The center is breeding the rare California condor, among many other rare and endangered species. Publications such as Forbes, Fortune and Sunset have cited the city for its quality of life. An article published by Forbes in 2018 named Boise the fastest-growing city in America. Its population of around 220,000 grew 3.08% in 2017, as well as employment by 30.58%. The cornerstone mall in Boise, Boise Towne Square Mall, is also a major shopping attraction for Boise, Nampa, Caldwell, and surrounding areas. The mall received upgrades and added several new retailers in 1998 and 2006. Home prices, a proxy for wealth, increased 11.58%--number four in the U.S. The state's largest giant sequoia can be found near St. Luke's Hospital. Sports Professional sports teams in Boise include the Boise Hawks of the independent baseball Pioneer League, the Idaho Steelheads of the ECHL