Fort Christian, the oldest standing structure in the US Virgin Islands, offers a glimpse into the rich history of Charlotte Amalie. Generally accessible, though some historic parts might have stairs, visitors can explore the fort and its exhibits solo or opt for a guided tour for deeper insights into its past as a jail, courthouse, and government house. It operates year-round, typically with a small entrance fee (a few dollars), though it's wise to check for holiday hours or potential closures during the hurricane season (June-November). A typical visit lasts 1-2 hours, providing ample time to appreciate the architecture, learn about the island's heritage, and enjoy views of the harbor, making it a valuable stop for history enthusiasts and a convenient addition to a downtown walking tour.