New Haven may conjure up Ivy League images, and rightly so. Yet while Yale plays a prominent role in this Connecticut city, New Haven's no mere college town. In fact, there's so much to do in "The Elm City" that a day's visit may not be enough.

Founded in 1638 by English Puritans, this city off of Long Island Sound was never able to rival nearby Boston and New York economically. However, it became home to strong industry thanks to resident innovators like Eli Whitney. Due to successful revitalizing efforts in the second half of the last century, New Haven is now bustling with activity.

It's also a breeze to get to. Ride Metro-North's New Haven line from Grand Central Station to the last stop. After two hours of scenic window views, you'll be geared up to get out and explore.