Hong Kong boasts an impressive 100 square kilometers of hexagonal volcanic rock columns, making it the largest coverage area in the world. Surprisingly, the second-place contender doesn't even come close to Hong Kong's extensive formation. Hong Kong!!!!!!

The volcano history was all started in High Island, Sai Kung of Hong Kong. In the Jurassic Period, which is about 160 million years ago from today, there is an 18km diameter long Ancient SuperVolcano located here. The High Island supervolcano's eruption occurred about 140 million years ago, left an indelible mark on Hong Kong's geology.

The High Island Supervolcano in Hong Kong is considered to be the strongest volcanic eruptions in world and human history. It last erupted 140 million years ago, spewing out at least 1,300 cubic kilometers of ash, enough to cover Hong Kong in a 1.3-kilometer thick layer or filling over 520 million standard swimming pool. If we assumes a uniform thickness of 1 meter, it can cover 1,300,000 kilometer square. This eruption was 10,000 times more powerful than Iceland's volcanic eruptions, marking a significant discovery in understanding Hong Kong's landscape.

Analysis of the resulting extrusive and intrusive igneous rocks reveals the immense power of this volcanic event, which affected nearly half of Hong Kong's total area. The impact is evident across Kowloon, Hong Kong Island, and Sai Kung, where volcanic remnants can still be observed today.

This single eruption shaped much of Hong Kong's current landscape, demonstrating the supervolcano's extraordinary strength and far-reaching influence on the region's geological formation.

Crystal Columns Cliff on North Ninepin Island is a breathtaking geological wonder, featuring towering hexagonal volcanic rock columns formed 140 million years ago. These columns create a striking contrast against the deep blue sea, exemplifying nature's power and Hong Kong's volcanic history within the UNESCO Global Geopark.

Moon Cliff on North Ninepin Island is a large sloping platform surrounded by hexagonal volcanic rock columns. Long-term weathering has created unique landforms, offering stunning vistas. This geological feature is part of the Hong Kong UNESCO Global Geopark, accessible by boat, and showcases nature's artistry in shaping volcanic rocks.

Big Stove Arch on North Ninepin Island is a remarkable sea arch formed by wave erosion of volcanic rock. This natural tunnel features a double connected corridor, offering kayakers a thrilling passage through stunning hexagonal rock columns, showcasing the power of coastal erosion within Hong Kong's UNESCO Global Geopark.

Silver Bottle Sanctuary on North Ninepin Island features some of the world's largest hexagonal volcanic rock columns, formed 140 million years ago. Dramatic cliff faces rise up to 50 meters, with columns exceeding 2 meters in diameter, showcasing the area's stunning geological formations within Hong Kong's UNESCO Global Geopark.