The American Museum of Natural History (abbreviated as AMNH), located on the Upper West Side of Manhattan, New York City, is one of the largest museums in the world. Located in park-like grounds across the street from Central Park, the museum complex comprises 27 interconnected buildings housing 45 permanent exhibition halls, in addition to a planetarium and a library. The museum collections contain over 32 million specimens of plants, humans, animals, fossils, minerals, rocks, meteorites, and human cultural artifacts, of which only a small fraction can be displayed at any given time, and occupies 2,000,000 square feet (190,000 m²). The museum has a full-time scientific staff of 225, sponsors over 120 special field expeditions each year, and averages about five million visits annually.