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Secrets of Akiyoshido Caves: Exploring the impressive rock formations and geological history of these caves


Akiyoshido Caves located in Yamaguchi Prefecture in Japan are a natural wonder that can leave you spellbound with their impressive rock formations and stunning geological features. The caves are almost 10 kilometers long and provide a glimpse into the history of the Earth over millions of years.

Geological history

The Akiyoshido Caves are believed to be around 300 million years old and were formed due to the dissolution of limestone by carbonic acid in underground rivers. The caves were discovered in 1926 and have since then been a subject of study for scientists and explorers alike. The caves provide an insight into the geological history of the region and the Earth as a whole. The layers of limestone that make up the caves offer a glimpse into the changing climate and environment of the Earth over millions of years.

Rock formations

The Akiyoshido Caves are known for their impressive stalactites, stalagmites, and other rock formations. The caves have a unique ecosystem with various cave-dwelling animals and plants that have adapted to life in complete darkness. The largest stalactite in Akiyoshido Caves is called “Mushroom Rock” due to its shape resembling a giant mushroom. Other notable formations include the “Sea of Clouds” and “Castle of the Gods.”

Exploring the caves

Exploring the Akiyoshido Caves is a unique experience that can provide a glimpse into the Earth’s history and the amazing geological features that it offers. Visitors can take a guided tour of the caves and explore the different sections of the cave system. It is advisable to wear comfortable shoes and clothes as the caves can be damp and slippery. The temperature inside the caves is around 17 degrees Celsius, so it is recommended to carry a light jacket.


The Akiyoshido Caves are an impressive natural wonder that provides a glimpse into the Earth’s history and geological features. Exploring the caves can be a unique and unforgettable experience that can leave you spellbound with the stunning rock formations and geological features that it offers.
Scenic Railways