South of Mount Pleasant and across from the Intracoastal Waterway, the community of Sullivan's Island is one of the area's true barrier islands. Access is available via the Ben Sawyer Causeway from Mt. Pleasant or the Isle of Palms Connector. This residential island blends charming older beach houses with newer construction for a medley of housing choices. A scattering of quaint 19th century "summer homes" have also managed to survive severe storms and the changing tastes in vacation architecture. Middle Street is the hub for the island's cluster of restaurants and pubs, creating a casual strip for those who enjoy evening strolls. Sullivan's Island is home to the site of the historic Fort Moultrie and its interpretation center, operated by the National Park Service. The center traces the fort's history from the American Revolution through World War II. The island's former military era has also left a fine old row of quarters that date back to World War I.