The third largest park in North America with eight million visitors a year, many of them strolling or walking the Marine Trail, a scenic 5.5-mile trail that winds along the water in the park's perimeter. This is just one of the many trails in the 1,000-acre park, which also includes an aquarium and nature center and other recreational amenities such as shops, cafes and restaurants, barbecue areas, family and group sessions, and outdoor biking trails .