Most of the park's area is on landfill created by the Central Railroad of New Jersey (CRRNJ) and the Lehigh Valley Railroad, defunct companies whose lines once terminated there. In the northeast corner of the park is the CRRNJ Terminal, a historic transportation building. Statue Cruises offers ferries to Statue of Liberty National Monument, Ellis Island and Liberty Island that depart nearby. A 50-foot from the Lehigh Valley Railroad can be found in the park at 40.709430°N 74.047327°W in the park. The southern Caven Point section of the park is separated from the main part of the park by the Liberty National Golf Club and is accessible along the water's edge using the Hudson River Waterfront Walkway. The long thin pier at the foot of Chapel Avenue that was once part of the park has been demolished. The Peninsula Park lies between the Big Basin of the Morris Canal and the Tidewater Basin in Paulus Hook. The Liberty Landing Marina is locate d on the Big Basin. Communipaw Cove is part of the 36-acre (15 ha) state nature preserve in the park and is one of the few remaining tidal salt marshes along the Hudson River estuary. The Interpretive Center, designed by architect Michael Graves, is part of the preserve. To the west lies the Interior Natural Area, which is off limits to the public and is being allowed through natural processes to recover from environmental abuse. The park is also the only state park in Essex, Hudson, and Bergen counties. Another section of the park is called Liberty Industrial Park.