1 Best Sight in The Florida Keys, Florida

Construction of the redbrick fort began in 1845 but was halted during the Civil War. Even though Florida seceded from the Union, Yankee forces used the fort as a base to block Confederate shipping. More than 1,500 Confederate vessels were detained in Key West's harbor. The fort, completed in 1866, was also used in the Spanish-American War. Take a 30-minute guided walking tour of this National Historic Landmark at noon and 2 or do a self-guided tour anytime between 8 and 5. One of the park's most popular features is its man-made beach, a rest stop for migrating birds in the spring and fall; there are also picnic areas, hiking and biking trails, and a kayak launch.