San Pedro Underwater Archaeological Preserve State Park

Resting beneath the warm, clear waters of the Florida Keys, San Pedro Underwater Archaeological Preserve protects the remains of a 287-ton Dutch-built ship that sank during a devastating hurricane in 1733. Part of the Spanish treasure fleet, the San Pedro now sits in approximately 18 feet of water about 1.25 nautical miles south of Indian Key, making it one of the most accessible shipwreck dives in the entire state.

Established in 1989 across 644 acres of Monroe County seafloor, this underwater preserve offers a genuinely rare experience: snorkeling or diving among centuries-old ballast stones, replica cannon, and an anchor — all surrounded by thriving coral formations and tropical fish. The shallow depth means even beginner snorkelers can explore the site comfortably. Expect to spot parrotfish, angelfish, barracuda, and the occasional nurse shark gliding through the wreck scatter.

There are no land-based facilities or camping at this park — it’s entirely underwater and accessible only by boat. Several dive operators and kayak outfitters in Islamorada offer trips to the site. Bring your own snorkel gear or rent from local shops.

The best time to visit is late spring through early fall, when seas are calmest and visibility often exceeds 30 feet. Morning trips typically offer the flattest water conditions.

This isn’t a theme-park shipwreck experience — it’s a quiet, powerful encounter with real maritime history resting exactly where the sea claimed it nearly three centuries ago.

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