JFK is one of the busiest airports in the world and, along with a SIXT rental car, is your key to exploring New York City. If you have some time to kill at this airport, be sure to treat yourself to a spa treatment, some retail therapy or even a haircut! The city itself has a big reputation around the world. While there is so much to see and do, we recommend starting with the Statue of Liberty, Central Park and one of the many art galleries or museums.