Sydney Just Opened a 42-Metre Steel Lookout Over a Former Quarry

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Written by Seth Sebastian

2026-05-15

Sydney’s new attraction: exploring the Southern Lookout

Sydney’s recently unveiled Southern Lookout at Hornsby Park offers a unique architectural experience. Standing 42 meters tall, the lookout is made of weathering steel and overlooks a former rock quarry, bringing renewed attention to its history.

Design and architecture

The Southern Lookout was designed by AJC Architects in partnership with Clouston Associates. Situated in northern Sydney, the structure rests above Hornsby Quarry, a site inaccessible to the public for over a century. This lookout is the first component of a 60-hectare landscape masterplan, symbolizing a new opening for exploration.

The use of weathering steel, also known as Cor-Ten, is notable for its ability to rust intentionally, forming a protective oxidized layer. The material’s warm amber-brown tone complements the quarry, which has been shaped by time and transformation.

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Structural design

The 42-meter platform extends through the forest canopy, anchored into the embankment on four angled columns. This minimalist approach minimizes ground disturbance, creating a bold yet careful architectural presence.

The experience

The lookout offers a sensory experience, with rhythmic sounds and views of the quarry’s topography enhancing the connection to the site’s scale. The entrance is framed by steel portals and gabion stone walls, reflecting the quarry’s industrial past without imitating it.

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Urban regeneration and future plans

The Southern Lookout is the first phase of opening Hornsby Quarry as a public park. While urban regeneration often progresses slowly, this lookout already invites visitors, marking a meaningful step forward.

AJC Architects, in collaboration with Hornsby Shire Council, respects the site’s complexity without over-explaining its history. The architecture enables visitors to connect with the place, offering height, steel, sound, and views, leaving thought to the observer.

The Southern Lookout exemplifies public architecture at its finest, creating a relationship between people and the location that might otherwise go unnoticed. Sydney’s natural geography now has a point of interaction that enhances appreciation of its dramatic landscapes.

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Source: yankodesign.com

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