Hidden Gems South Coast NSW: Bombo Quarry, Cathedral Rocks & Trial Bay Gaol

March 8, 2026

Hidden Gems South Coast NSW: Beyond the Beaches

The NSW South Coast is famous for its pristine beaches, but the region's true hidden gems lie in its dramatic geology, WWII fortifications, historic ruins, and abandoned industrial sites. From hexagonal basalt columns that look like another planet to granite prison fortresses and underground bunkers, these locations showcase the South Coast's incredible diversity.

Geological Wonders & Coastal Formations

Bombo Quarry, Kiama

This heritage-listed site is a surreal landscape of jagged basalt columns, towering sea stacks, and deep stone channels where the Pacific Ocean crashes with incredible force. The hexagonal columns were formed 270 million years ago, then sculpted by quarry workers in the 1880s-1940s. Today it's a premier dark sky site for Milky Way photography and served as the filming location for Mighty Morphin Power Rangers.

Highlights: Hexagonal basalt columns, astrophotography, new 2026 staircase, sunrise photography

Cathedral Rocks, Kiama

These dramatic sea stack formations rise from the ocean like Gothic spires, creating one of the most photographed coastal scenes in NSW. The rocks are best viewed at low tide when you can walk among the formations, and the golden hour light transforms them into glowing sculptures.

Highlights: Sea stack formations, rock pools, golden hour photography, Kiama Blowhole nearby

Military History & WWII Fortifications

Hill 60, Port Kembla

High above the Port Kembla Steelworks, this WWII fortress was built to protect the strategically important steel industry. The massive network of bunkers, engine rooms, and observation posts carved into the sandstone remains beautifully preserved. The 360-degree views span from the Five Islands to the BlueScope Steelworks, and it's a popular spot for hang gliders and paragliders.

Highlights: Gun emplacements, underground tunnels, 360-degree views, Aboriginal heritage site, Fishermans Beach below

Historic Ruins & Heritage Sites

Trial Bay Gaol, South West Rocks

Perched on the cliffs of Arakoon National Park, these granite ruins look more like a Scottish castle than an Australian prison. Built in 1886 to house prisoners constructing a breakwater (which failed and washed away), the gaol was later reopened during WWI to hold German internees. Today it's a staggering ruin with roofless cell blocks, a museum, and the German Monument on the hill behind.

Highlights: Granite ruins, WWI German internee history, museum, sunset views, Trial Bay camping, Front Beach swimming

Mittagong Maltings, Southern Highlands

Three massive red-brick towers with distinctive conical roofs loom over Mittagong's railway line. Once owned by Tooth & Co., this 1899 malthouse produced the malt for famous beers like KB Lager. After devastating fires in 1981, it sat in beautiful decay for 40 years. Now being reimagined as a destination, you can view the exterior from Winifred West Park.

Highlights: Three conical towers, Victorian architecture, winter mist photography, Winifred West Park viewpoint