3 Best Sights in Old City and Historic Downtown, Philadelphia

Designed by the well-known Philadelphia architect William Strickland and built in 1832, this impressive Greek Revival building served as the city's commercial center for 50 years. It was both the stock exchange and a place where merchants met to trade goods. In the tower a watchman scanned the Delaware River and notified merchants of arriving ships. The exchange stands behind Dock Street, a cobblestone thoroughfare. The building houses a small exhibit on its history and now serves as the headquarters for Independence National Park.

This is the headquarters of the American Philosophical Society, founded by Benjamin Franklin in 1743 to promote "useful knowledge." The members of the oldest learned society in America have included Washington, Jefferson, Lafayette, Emerson, Darwin, Edison, Churchill, and Einstein. Erected between 1785 and 1789 in what has been called a "restrained Federal style" (designed to complement, not outshine, adjacent Independence Hall), Philosophical Hall is brick with marble trim, has a handsome arched entrance, and houses the Society's museum, open to the public Friday to Sunday. The society's library is across the street in Library Hall.

The first U.S. mint was built in Philadelphia at 16th and Spring Garden streets in 1792, when the Bank of North America adopted dollars and cents instead of shillings and pence as standard currency; the current mint was built in 1971. During a self-guided tour you can see blank disks being melted, cast, and pressed into coins, which are then inspected, counted, and bagged. Historic artifacts such as the Key to the First Mint and the gold medal awarded to General Anthony Wayne for his capture of Stony Point during the Revolutionary War are displayed. Seven Tiffany glass tile mosaics depict coin making in ancient Rome. A shop in the lobby sells special coins and medals—in mint condition.