Jeju is a volcanic island off the southern coast of South Korea formed by an outpouring of lava about 2 million years ago. The lava tubes formed about that time are still there as a testament to the volcanic activity. These cave-like formations were designated a natural World Heritage Site by UNESCO in 2007.
The most curious fact about Jeju Island is its women divers, called haenyos. These incredible women dive for seafood and seaweed at great depths without any scuba gear. In fact, they can dive up to 20 meters deep and hold their breathing for almost 2 minutes. This job is not risk free, since the divers must also contend with other dangers such as jellyfish, and sharks.
Jeju Island is a popular vacation destination during summer months.