Standing guard over Frederiksted and its harbor, the red-colored Fort Frederik was the site of the most important event in St. Croix history. After a march from nearby Estate La Grange, about 8,000 of the islands slaves demanded their freedom. Standing on the forts ramparts on July 3, 1848, Danish Governor Peter Scholten acceded. Now a National Historic Landmark, the fort was built between 1752 and 1760. Admission is free, but donations are welcome.