Sai Kung Geopark

Geological Formation & Features

The Sai Kung Volcanic Rock Region, part of the wider Hong Kong UNESCO Global Geopark, holds one of the most extensive and best-preserved fields of hexagonal rock columns in the world, formed roughly 140 million years ago during the Early Cretaceous. The columns are rhyolitic — a light-coloured, silica-rich volcanic rock, distinct from the dark basalt columns that make up most other famous hexagonal-column sites globally — laid down as thick volcanic ash that cooled slowly enough to contract into regular polygonal columns rather than shattering randomly. High Island Reservoir, formed by sealing the channel between High Island and the mainland with East and West Dams in the 1970s, cuts directly through the formation, which is part of why the clearest columns are visible along the dam’s exposed rock faces rather than deeper in the surrounding hills.

Conservation & ESG

Global Geopark status, granted by UNESCO, comes with an explicit conservation and education mandate rather than being a purely honorary label: the designation requires ongoing geo-heritage protection, visitor management, and community engagement to keep the status current. Hong Kong’s park first joined the Global Geoparks Network in September 2011, was renamed Hong Kong UNESCO Global Geopark after UNESCO formalised the programme in 2015, and has since passed multiple four-yearly revalidation reviews, most recently retaining its status again in 2026 — a recurring check that other, less actively managed geological sites never have to clear. That management burden sits alongside real pressure from small-boat tourism — kayak and speedboat operators bring growing numbers of visitors to see the columns from the water, and the balance between public access and protecting an unrepeatable geological formation is an ongoing management question for the park authority rather than a solved problem.

Transit Connections & Access

From the urban core, take the MTR Kwun Tong Line to Choi Hung Station (Exit C2), then board Green Minibus 1A to Sai Kung Pier. From the pier, licensed kai-to ferries run to Sharp Island and toward High Island, though schedules shift with sea conditions and can be cancelled outright in rough weather. On weekends, bus route 94 runs from the Sai Kung Bus Terminus to Wong Shek Pier, connecting hikers directly to Stage 2 of the MacLehose Trail.

Local Cuisine & Provisions

Sai Kung Town’s seafront promenade functions as the practical staging point before heading out to the geopark. Seafood restaurants around Hoi Pong Square sell live catch straight from tanks fed by the town’s own fishing boats — steamed grouper and salt-baked squid are typical orders — a direct, visible link between the dining room and the pier a few metres away, and prices are generally set by weight and negotiated at the tank rather than fixed on a printed menu, so confirming a price before an order is cooked is standard practice locals rarely skip. For those heading straight out on a boat or trail, the town’s bakeries sell pineapple buns and egg tarts as portable trail food, standard provisioning for a day that starts in a restaurant and ends on volcanic rock.