Located on the southernmost tip of Manhattan Island and known for being the entrance to where New York City began, Castle Clinton National Monument is a must see for RV lovers and history buffs. Construction on Castle Clinton (also known previously as Fort Clinton and Castle Garden) began in 1808 and was finished in 1811 and was originally built to prevent a British invasion. Since then it has been used for a multitude of different activities and services, including as an entertainment center, immigration center and aquarium. It has been restored by the National Park Service and nowadays, the site houses the ticket office for the Statue of Liberty.
If you are looking to learn more about the history of Castle Clinton then you must visit it in person. At the site of the castle there is a museum available for you to peruse and guided tours of the castle are often held by National Park staff throughout the year. Since it is the ticket office for the Statue of Liberty you will also be able to easily catch the ferry over to the iconic structure. The location of Castle Clinton within Battery Park also means that you are in close proximity to other interesting historical sites, including the African Burial Ground National Monument.
Due to the location of Castle Clinton in Manhattan there are no RV camping options. Despite this, you can park your RV across the Hudson in New Jersey as there is an urban camping ground available within Jersey City. This campground is open all year round.