23/05/2026
🌋 Hong Kong’s Hidden Supervolcano: High Island
Out in Hong Kong’s eastern waters lies a place most people pass—but few truly step into.
This is not just a coastline. It is the remains of a supervolcano.
As you approach from the sea, hexagonal rock columns rise from the shore—so precise they barely look natural. But they were formed around 140 million years ago, when molten rock cooled and cracked under intense pressure.
And you are not just here to look.
You walk between them. Move alongside them. Enter from the sea.
Some sections feel like towering walls, others like a forest of stone pillars. With every step, you are moving through a piece of Earth’s history.
At some point, it clicks:
You are not just seeing a landscape.
You are standing inside an ancient event.
What you experience:
• World-class hexagonal rock columns
• Up-close volcanic geology
• Sea access to hidden formations
• A completely different side of Hong Kong
No filters. No design. Just nature at its most unreal.
Splitdyboat Signature UNESCO Global Geopark Tours
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