Tourist attractions include Blackbeard's Castle which is one of the most visited attractions in the Town, Bluebeard's Castle, 17th-century Fort Christian, the green and distinctive Legislature Building, the 99 Steps Stairway, Emancipation Garden, Market Square, Seven Arches Museum, St. Thomas Synagogue, Frederick Lutheran Church, and the Weibel Museum. Tourists usually either arrive by airplane at the Cyril E. King International Airport, approximately  west of downtown Charlotte Amalie, or by docking at the cruise ship port in Havensight. In the 21st century, Charlotte Amalie has benefited from proximity to San Juan, Puerto Rico, where passengers from larger aircraft can transfer to smaller aircraft for a 30-minute flight to Charlotte Amalie. The City has also become a jumping-off place for other islands in the U.S. and British Virgin Islands. In this century, there have been more high-speed ferries each year leaving Charlotte Amalie for St. Croix, St. John and Tortola. A seaplane wharf is near the west end of the inner harbor; the planes take passengers to St. Croix.