courtyard, brick powder magazines, and two subterranean water tanks covered by wooden trapdoors. The SeaGlass Carousel is just southeast of the modern-day fort. Since 1986, the fort's interior has housed an information kiosk and ticket booths for the Statue of Liberty National Monument, which comprises the Statue of Liberty and Ellis Island. Statue Cruises, which operates the only ferry line to Liberty Island and Ellis Island, sells ferry tickets inside the fort. Admission to Castle Clinton itself is free, and the National Park Service gives guided tours when the monument is open to the public. The fort also contains a small history exhibit and occasionally hosts concerts. The nonprofit Battery Conservancy is also housed within Castle Clinton. According to the NPS, Castle Clinton typically has over three million visitors a year, making it one of the busiest national monuments in the United States. Restoration The Castle Clinton National Monument was formally dedicated on October 24, 1950. Battery Park reopened to the public two years later, although Castle Clinton had not yet been restored at the time. The NPS announced in early 1952 that it would begin restoring the fort's exterior; the project would cost $117,000 and take two years. As part of this project, the NPS reconstructed the fort's original door. Following the partial demolition of Fort Clinton in the 1940s, only the exterior wall remained intact. The interior of the fort was so dilapidated that, according to The New York Times, "not even grass grew in the desolate, cratered parade ground". In 1954, the New York City Council passed a resolution asking Congress to establish a committee to provide suggestions for restoring Castle Clinton, the Federal Hall National Memorial, and the Statue of Liberty National Monument. The next year, the federal government created the New York City National Shrines Advisory Board. The board first convened in February 1956, and the federal government allocated $498,500 that July for a renovation of Castle Clinton. In February 1957, the board recommended allocating $3 million for the restoration of the three sites. The United States Department of the Interior subsequently postponed the repair project to 1966. This led architect Frederick G. Frost Jr. to propose in 1958 that the fort be renovated for use as a maritime museum and a restaurant. In 1962, New York City parks commissioner Newbold Morris proposed relocating 18 columns from the soon-to-be-demolished Pennsylvania Station to a promenade outside