Ellis Island is not a park, but a national historical site. Millions of immigrants came through it's doors from Europe so they could make a new life in the US. It is worth a visit.
national park service
The journey from Battery Park in New York City to Ellis Island is about 20 minutes by ferry.
It is now a historical national park and a museum.
The Ellis of Ellis Island was named after Ruby Ellis who was the first immigrant from Russia.
I assume you are asking about how to go to Lady Liberty and Ellis Island. There are tours you can buy at Battery Park and board the boats going to both sites.
Broadway, Times Square, Central Park, Central Park Zoo, The Statue of Liberty, The Empire State Building, Ellis Island, and Liberty Island.
In 1965, president Johnson issued a proclomation that gave the island to the National Parks Service, but it has only been giving tours to the public since 1976. http://www.history.com/content/ellis-island/timeline
What is special about Ellis Island?
Immigrants got to Ellis island by boat
Ellis island started out as just an empty place in New York City and was made into Ellis island
ellis island
Ellis Island was founded in 1892