Technically not secret anymore but still feels like stumbling into Narnia with harbour views. Wendy Whiteley (widow of famous Australian artist Brett) has been cultivating this wild overgrown wonderland since the 1990s with insane harbour bridge angles.

No proper entrance sign because that would ruin the vibe — Access via concrete stairs from Clark Park Road in Lavender Bay. Open 24/7 but daylight recommended unless you enjoy twisted ankles on steep garden paths. Ferry from Circular Quay to Milsons Point wharf then 10-15 minute walk through residential streets.

Weird artsy peaceful energy with Brett's sculptures hiding throughout native bushland. Not manicured Instagram gardens but raw creative space that feels like living artwork. Best early morning 7-9am or late afternoon 4-6pm when harbour light filters through eucalyptus canopy.

Paths wind down hillside toward harbour with multiple viewing platforms. Bring water and decent shoes — It's proper bushwalking through art installation disguised as secret garden.