Trenton

A few miles north of Trenton is Princeton, home of the famed university.

Six Flags Great Adventure
in Jackson Township New Jersey
Sesame Place
100 Sesame Rd, Langhorne, PA take Route 1 S into PA and take Oxford Valley exit, +1 215 752-7070, (http://www.sesameplace.com). Great for families, a Sesame Street-themed amusement park featuring water rides and kid-friendly thrill rides. $53 a person, but discounts are regularly available.

If you are looking for a different experience close to the area, the Jersey Shore is perfect. Point Pleasant, Seaside, and Belmar all offer beaches and boardwalks within 45 minutes of the city via I-195.

Trains also provide a quick ride to both Philadelphia as well as New York City.