Balboa Park is made up of more than 1000 acres and offers fifteen museums, various gardens, arts and international culture associations, as well as the San Diego Zoo, making it a place that offers something historical, horticultural, educational and recreational for everyone. Approximately 14 million visitors come to the park each year. Displays of internationally significant art treasures, exotic animal species, unique model railroads, world folk art, sports memorabilia and rare aircraft–to name a few–are on view in the Park's museums.