Hyundai Motors Ulsan Plant is the world's largest single plant. It is made up of five independent factories, with approximately 32,000 personnel producing an average of 5,800 vehicles per day. Another surprising feature of this complex is the 600,000 trees planted within the area, making it a factory surrounded by a forest. Visitors to the plant can tour the vehicle manufacturing plant and the port that houses 76,000-ton ships; a reservation in advance is required for the tour.