📜 Historic military fortification with 150 years of history, located in Mosman, Sydney Harbour. 🔍 Features WW2 fortifications, gun emplacements, and interlinking tunnels. Maintained by a private group, grounds open to the public. # Why Go ⚓ Explore historic WW2 fortifications and hidden tunnels. 🌊 Enjoy breathtaking Sydney Harbour views from Belvedere lookout. 🚶 Walk along Harbour Bridge to Spit Bridge walking track. 📚 Learn about Sydney's defence strategy and Aboriginal history. # Tips 🧺 Pack a picnic to enjoy at Belvedere lookout. 🌟 Great spot to watch the Sydney Hobart Yacht Race start. # Hours 🕒 Hours vary: Wednesday Noon–9 PM, Thursday 11 AM–4 PM, Friday 9 AM–7 PM, Saturday 10 AM–10 PM, Sunday 10 AM–9 PM, Monday 11 AM–5 PM. Closed Tuesday. # Accessibility ♿ Disabled access available, contact operator for details.