America, of course, is a nation of immigrants. Native Americans comprise a very small percentage of the nation's population. Over 40% of all Americans can trace their ancestry to Ellis Island, the official entry point for over 12 million people who came to the United States from 1892 until 1954. At the height of that period, 12,000 people a day were processed here.
Lest you get numbed by the numbers, the Museum at Ellis Island does an excellent job of presenting the individual stories of the men, women, children and families who stood in the Great Hall of Registry, attempting to leap the legal and medical hurdles in order to be granted admission into the "Land of Opportunity". Thousands of personal items are display, and those who wish to examine their own genealogical roots can do so for a small fee. The museum itself is free, and is accessible by ferry.