North Ninepin Island is renowned for its stunning hexagonal volcanic rock columns, formed 140 million years ago. The island features dramatic cliffs, unique formations like Silver Bottle Sanctuary, and picturesque landscapes, making it a must-visit within Hong Kong's UNESCO Global Geopark for nature lovers and adventure seekers.

South Ninepin Island is renowned for its stunning volcanic rock formations and sea erosion features, including the iconic Three Dragon Mouth tunnel cave. The island offers breathtaking coastal scenery, unique sea caves like Y-Shaped Cave, making it a must-visit within Hong Kong's UNESCO Global Geopark.

All Hexagonal columns in Hong Kong are part of the High Island Formation, formed during the Early Cretaceous period, approximately 140 million years ago. The region was once home to a massive volcano that erupted explosively, spewing out large amounts of volcanic ash and lava. As the volcano collapsed, it formed a caldera where the volcanic materials cooled and contracted, creating the distinctive hexagonal columns through a process known as columnar jointing.

Po Pin Chau, near Sai Kung, is a captivating sea stack featuring towering hexagonal volcanic rock columns formed 140 million years ago. Once part of Fa Shan, it was separated by erosion, creating a unique geological wonder within Hong Kong's UNESCO Global Geopark, offering stunning coastal views and scenic boat tours.

Wang Chau, part of the Ung Kong Group, is a small island in Sai Kung, Hong Kong. It features stunning volcanic rock formations, including the iconic Wang Chau Kok Cave, a 20-meter-tall sea arch. The island is known for its unique hexagonal columns and offers breathtaking views, making it a popular destination for nature enthusiasts and adventure seekers.

Basalt Island, part of the Ung Kong Group, is a geological gem in Hong Kong's UNESCO Global Geopark. Despite its name, it features rhyolitic tuff formations, not basalt. The island is renowned for its unique volcanic rock formations, including the impressive Guandao Cave, and offers stunning sea arches and kayaking opportunities.

Bluff Island, part of the Ung Kong Group, is a geological gem in Hong Kong's UNESCO Global Geopark. It features stunning volcanic rock formations, including hexagonal columns and the iconic sea tunnel cave. The island boasts Hong Kong's highest sea cliffs and is renowned for its rich marine life and diverse coral communities.

Jin Island, also known as Tiu Chung Chau, is a captivating island in Sai Kung, Hong Kong. It features stunning geological formations, including the iconic Bell Cave, a 30-meter-tall sea arch resembling a temple bell. The island's landscape is shaped by easterly winds and sea waves, creating unique sea caves and stacks.