When people came as immigrants to the United States from 1892 to 1954 they first had to stay at Ellis Island, an island in the harbour of New York. There they were questioned and examined for diseases. 12 million people arrived to the country on this way.
Today, the island is an immigration memorial, you can learn a lot about migration, visit the huge building and walk through the gardens to a site showing the names of all immigrants passing by. When I visited the memorial, most original artefacts were still removed because of hurrican Sandy in 2012.
You can get to Ellis Island by boat from The Battery, located at the southeast of Manhattan. The boat cruise does a first stop at the Statue of Liberty and then continues to Ellis Island. There is also a bridge from New Jersey, the town the island is located closest to.
New York, United States