The biggest draws to St. Thomas are beautiful beaches and duty-free shopping. Once your luggage is full of china, crystal, liquor and jewelry, you can explore life outside the markets, and there's no shortage of options.  You can visit Fort Christian, the 17th century Dutch stronghold; swim or snorkel in the calm blue waters of Magens Bay; hop a ferry to St. John; or just lie beside the pool with a daiquiri.