📜 National marine sanctuary in Lake Huron, protecting a nationally significant collection of nearly 100 historic shipwrecks. 🔍 Part of the U.S. National Marine Sanctuary System, known as 'Shipwreck Alley', preserving vessels from 1849 to 1966. # Why Go 🚢 Explore world-class preserved shipwrecks via diving, snorkeling, or glass-bottom boat tours 🏛️ Visit the free Great Lakes Maritime Heritage Center for exhibits and artifacts 👨‍👩‍👧‍👦 Enjoy diverse educational programs and community events for all ages # Tips 🗓️ Moorings for divers available May to September. 🚤 Glass-bottom boat tours run June to October. 📅 Check calendar for film festivals, maritime festivals, and educational events. 📍 Located in Alpena, Michigan, with visitor center open daily. # Cost 💰 Lady Michigan boat tours: Adults $30, Ages 6-12 $10, Ages 5 & Under $1. Heritage Center free. # Hours 🕒 Great Lakes Maritime Heritage Center: Daily 8am – 5pm. Lady Michigan cruises: June-Oct.