Red roofed buildings speckle the lush tropical landscape in Gustavia, St. Bart's tiny, relaxed Caribbean capital whose historic sites can be reached in one day of trekking around town. 17th century forts line the harbor, from Fort Karl in the north to Fort Gustaf with its lighthouse and cannons in the south. Near Fort Gustaf is the popular Shell Beach, where beachcombers rove for sparkling shells. The town's many duty-free boutiques call to shoppers while cozy cafes offer views over the harbor.