Admission is $15 per adult and free for kids 15 and under, making this one of the best value stops in St. Augustine. The 17th-century Spanish stone fort sits right on the waterfront and kids can climb up to the gun deck for sweeping bay views. Rangers offer free talks throughout the day that are genuinely engaging for school-age kids; toddlers will lose interest fast so plan for a 45-60 minute visit with little ones. The interior courtyard is mostly flat and stroller-friendly but the staircases to upper levels are steep and narrow. Go early on weekday mornings to avoid cruise ship crowds that flood the area by late morning.

Address: 1 S Castillo Dr, St. Augustine, FL 32084

Google Maps: Click here for directions

Cost: Low Cost $