Hexagons and Hidden Bays: A Field Guide to Hong Kong UNESCO Global Geopark
Where hexagonal basalt meets emerald bays — a practical, poetic guide to Hong Kong’s coastal geology
You step off the small ferry and the island air is immediate — salt-sweet, carrying a faint diesel tang and the distant clack of gulls. The coast in front of you does not look like the familiar photo of Hong Kong’s glassy skyline; instead, cliffs rise in ordered, geometric tiers, each column a dark hexagon stacked like a set of giant basalt pencils. At the edge of the water a solitary sea stack, Po Pin Chau, stands like a weathered monument, dared into being by wind and tide.
Trail Wisdom
Start at first light
Morning light reveals the hexagonal structure and keeps midday heat at bay; plan to arrive before 9 a.m. for best conditions.
Wear rock-gripping shoes
Trails mix coastal slabs and loose scree—sturdy trail shoes with good tread reduce slips and scrapes.
Hydrate and shade up
Parts of the geopark are exposed; carry at least 1.5–2 L of water per person and a hat or sunshirt.
Check tide and boat schedules
Boat access to sea caves and some stacks depends on tide; confirm departure times with operators in Sai Kung.
Local Knowledge
Hidden Gems
- •Quiet coves on the north side of Sharp Island (Kiu Tsui) that are less crowded at low tide
- •The small pier villages near Leung Shuen Wan for a glimpse of local fishing life
Wildlife
Eastern great egret, Black-faced spoonbill (seasonal and rare)
Conservation Note
Visitors are asked to stay on marked paths, avoid collecting rocks or shells, and choose licensed boat operators that follow local marine-protection guidelines.
The geopark’s columns were formed by volcanic lava flows and fast cooling during the Cretaceous period; the park received UNESCO Global Geopark status in 2011, highlighting its global geological significance.
Seasonal Guide
spring
Best for: wildflowers along ridgelines, mild hiking weather
Challenges: occasional rain showers, variable sea conditions
Spring brings comfortable temperatures and early blooms; expect some wet days and check weather forecasts for boat trips.
summer
Best for: swimming in sheltered bays, long daylight for island hopping
Challenges: intense sun and humidity, typhoon season risk (July–September)
Summer is great for water activities but bring strong sun protection and avoid excursions during typhoon alerts.
fall
Best for: clear skies and cool temps, optimal visibility for photography
Challenges: busy weekends with local visitors, higher demand for boat charters
Fall is the sweet spot—stable weather and crisp light—book charters and guided trips in advance on weekends.
winter
Best for: crisp, clear vistas, quieter trails
Challenges: cool evenings, some services may have reduced hours
Winter is mild and clear in Hong Kong; dress in layers for cooler mornings and enjoy quieter trails.
Photographer's Notes
What to Bring
Sturdy trail shoesEssential
Provides grip on basalt slabs and protection on uneven coastal trails.
Sun protection (hat + SPF 30+)Essential
Essential on exposed trails and reflective water surfaces.
Water bottle (1.5–2 L)Essential
Hydration is crucial on exposed coastal walks and during boat or kayak trips.
Light waterproof layer
Useful for sudden showers or cool sea breezes in shoulder seasons.
Common Questions
How do I get to the geopark from central Hong Kong?
Take public transport to Sai Kung town (MTR to Diamond Hill then bus, or direct minibus services), where most boat charters and trailheads operate; taxis and rideshares are also options.
Do I need a guide to visit the hexagonal columns?
No—High Island’s Geo Trail is accessible independently, but guided boat tours and kayak trips add safety, local interpretation, and access to sea cliffs.
Are there swimming opportunities inside the geopark?
Yes—several sheltered bays and beaches allow swimming; check local signs and avoid swimming near boat lanes.
Can I take rock samples home?
No—removing geological samples is prohibited and undermines conservation and scientific value of the park.
What wildlife might I see?
Expect coastal birds like egrets and cormorants, occasional reef fish in clear shallows, and small terrestrial mammals in scrub areas.
When is the best time to photograph the columns?
Early morning and late afternoon light enhance textures; a polarizing filter helps reduce water glare and deepen sky color.
What to Pack
Sturdy trail shoes (traction on basalt), 1.5–2 L water (hydration on exposed trails), sun protection (hat + SPF), waterproof bag for electronics (protect from spray)
Did You Know
Hong Kong UNESCO Global Geopark was officially designated as a UNESCO Global Geopark in 2011, recognizing its unique volcanic and sedimentary geology.
Quick Travel Tips
1) Base in Sai Kung for easy access; 2) Book boat charters in advance on weekends; 3) Check tide charts for cave and stack access; 4) Bring cash for small village restaurants.
Local Flavor
Sai Kung’s waterfront is famous for fresh seafood and dai pai dong eateries; pair a morning hike or boat trip with an afternoon meal of steamed fish or a seafood hotpot at one of the harborfront restaurants.
Logistics Snapshot
Getting there: Sai Kung is the gateway (public transit + short taxi); Time needed: 2–6 hours; Costs: boat charters vary—book locally; Skill: basic hiking and boat etiquette; Safety: sun, tide awareness, and proper footwear required.
Sustainability Note
Respect the geopark by staying on trails, using licensed eco-conscious operators, and not removing rocks or shells — small actions help preserve geological features for science and future visitors.