Castillo de San Marcos National Monument
Activities★ 4.7 (38,401)
From the Wayfind guide
The 1600s Spanish coquina fortress on Matanzas Bay anchors every trip: cannon-fire demonstrations, rampart views, and stone that has outlasted every flag flown over it. Adult entry runs about $15 and kids are free.
Read the full 10 Best Things to Do in St. Augustine This Summer (2026) →Wayfind is an independent guide, not affiliated with the places listed. Details come from Google and may change — confirm hours before you go.