Staten Island Ferry
A must-see attraction that doesn't cost a dime? The ferry from Battery Park to Staten Island and back is a great way to see the Lower Manhattan skyline and Hudson river life while resting your feet. The ferry also skirts the Statue of Liberty affording decent views of this iconic structure. Most tourists stay onboard for the return leg, but it's worth hoping off and exploring a bit of Staten Island while you're there. The ferry leaves every 30 minutes and takes 25 minutes each way.
Opening times: Runs 24 hours, see website for schedule.