OLD CITY. Wedged between Market and Chestnut Streets, the Philadelphia Bourse Building was completed in 1895 and modeled after the Hamburg Bourse, a traditional center of commerce where local merchants could gather to exchange commodities and arrange the buying, selling and shipping of wares. Today, the Bourse still plays an important role in the local economy, only now it is as a retail center that features everything from cheese steak joints to souvenir shops; there's even a Ritz movie theater. The Bourse is listed on the National Register of Historic Places.

CENTER CITY. Located between the Liberty Place towers, this sleek shopping complex offers an impressive array of over 60 retail tenants, including J. Crew, The Body Shop, Jos. A. Bank and Ann Taylor Loft. Completely enclosed, the center is a pleasant escape from the weather outside (especially in the winter), and helps its popularity by hosting a wide slate of special events each season. There's also a food court should you find yourself in need of some afternoon sustenance. Parking is available in the four-level complex located under Liberty Place.