You will be given a definition of a task first, then some input of the task.
Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.

Castle Clinton or Fort Clinton , previously known as Castle Garden , is a circular sandstone fort now located in Battery Park , in Manhattan , New York City . It is perhaps best remembered as America 's first immigration station ( predating Ellis Island ) , where more than 8 million people arrived in the U.S. from 1855 to 1890 . Over its active life , it has also functioned as a beer garden , exhibition hall , theater , and public aquarium , and currently is a national monument .
Output:
Castle Clinton