Geomunoreum, Volcanic hill in Jeju-si, South Korea
Geomunoreum is a volcanic hill on Jeju Island, South Korea, covered in a dense dark forest that gives it a sombre appearance. Around its base runs a network of lava tubes formed when ancient lava flows cooled and left hollow tunnels underground.
Geomunoreum formed through volcanic eruptions thousands of years ago, along with the lava tube network that surrounds it. The site was later recognized as a UNESCO World Natural Heritage property as part of Jeju's volcanic landscape.
The hike to the top follows marked trails and takes a few hours depending on the pace. Access can be limited at certain times, so checking ahead before visiting is a good idea.
The name Geomunoreum means 'Black Mountain' in Korean, a reference to the dark forest that cloaks the hill rather than the color of its rock. On windy days, air flows through the cone's many surface openings and underground tunnels, creating a noticeable breeze even in summer heat.
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