Here are some top things to do in St. Augustine:

• Visit the historic Castillo de San Marcos, a 17th-century Spanish fortress with ranger talks, reenactments, and weapon demos.
• Explore the Lightner Museum in a former 1887 hotel featuring 19th-century artifacts and furnishings.
• Tour the Fountain of Youth Archaeological Park to see exhibits on Native American history and sample its famed spring water.
• Walk along St. George Street, a pedestrian thoroughfare lined with historic buildings, shops, and restaurants.
• Take the Old Town Trolley Tours for hop-on-hop-off access to major attractions.
• Visit the St. Augustine Lighthouse & Maritime Museum for climbing tours and a shipyard playground.
• Explore the St. Augustine Alligator Farm Zoological Park with reptile shows and zip lining.
• Discover pirate history and interactive exhibits at the St. Augustine Pirate & Treasure Museum.
• Enjoy nature and hiking at Fort Mose Historic State Park and the GTM Research Reserve.
• Tour the St. Augustine Distillery for tastings of vodka, gin, rum, and whiskey.
• Relax or surf on St. Augustine’s beaches.
• Family-friendly options include the St. Augustine Aquarium and splash parks.

There are many more historic sites, museums, and outdoor activities. For a historical and cultural experience with a mix of nature and family fun, St. Augustine offers a rich array of things to do. If you want recommendations for specific types of activities or interests, I can provide details. Otherwise, these highlights will give you a great start to exploring the city. Let me know if you want a focused list or more details on any activity.