There are very few truly free things in life but in New York, you can experience one of them. The Staten Island ferry plies a commuter route between Battery Park on the southern tip of Manhattan Island and Staten Island and it costs absolutely nothing to ride on it
It’s famous as the best way to get a free view of the Statue of Liberty, which is west of the route that the ferry travels. However, this is the reason most tourists go on the ferry, so there will be a bit of a rush if you’re boarding from Manhattan. Dad and I find it best to wait for the return journey when people have got bored on that view and it’s less crowded on the side of the boat facing the statue