Explanation

 Jeju Island is a volcanic island.

 the surface area of Jeju Island is 1,846 sqkm

Jeju Island is the largest island on the coast of the Korean Peninsula,

Jeju Island is the main island of Jeju Province in South Korea

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Due to the breathtaking beauty, of South Korea 

three areas are known as

1. Jeju Volcanic Island,
2. Lava Tubes,
3. and Jeju Island ’

are selected unanimously by the World Heritage Committee as the first World Natural Heritage Site in South Korea.

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