Jeju is the largest island off the coast of the Korean Peninsula. The volcanic island is dominated by Hallasan at its center. Jeju and its lava tubes were designated a natural World Heritage site by UNESCO in 2007.
Seongsan Ilchulbong, also called ‘Sunrise Peak’, is an archetypal tuff cone formed by hydrovolcanic eruptions upon a shallow seabed about 5 thousand years ago. There are no other known hydromagmatic volcanoes with a well-preserved tuff cone and diverse internal structures along a sea cliff and Seongsan Ilchulbong is a designated UNESCO World Natural Heritage site. Visitors are able to get a panoramic view of downtown Jeju from the top of the peak.
The Haenyeo Museum showcases the unique activities and culture of Haenyeo (lit. sea women), who are female divers in Jeju. Known for their independent spirit, iron will and determination, the haenyeo are representative of the semi-matriarchal family structure of Jeju. Jeju’s diving tradition dates back to 434 A.D. With each dive, haenyeo plunge up to 30 meters deep and can hold their breath for over three minutes. Their harvests consist of abalone, conch, octopus, sea urchins, sea squirt and many more.
The Manjanggul is a lava tube that stretches for as far as an approximate 8,928 m, its length ranks amongst the top 10 in the world. It is also the second longest lava tube in Jeju island. It is regarded as having significant scientific and heritage value, owing to its excellent condition of preservation despite its age of formation (about 300,000 to 200,000 years ago).
Hallim Park is one of the oldest and most popular tourist attractions in Jeju. It is located on the west coast of the island. The park offers a variety of scenic gardens, two caves, a small zoo, and a folk village.
Opened in 2004, Jeju Loveland is an outdoor sculpture park that focuses on the theme of sex with sex education films and 140 sculptures representing humans in various sexual positions. It also has other elements such as large phallus statues, stone labia, and hands-on exhibits.
Hallasan (san: mountain) is a shield volcano on Jeju Island. Standing at 1,950 metres, it is the highest mountain in South Korea. The mountain can be seen from all places on the island, but its peak is often covered in clouds. The soil of Hallasan is mostly made out of volcanic ash, which mainly contains volcanic ash, volcanic sand, and lapillus. There is a crater lake on Hallasan called Baengnokdam, literally "white deer lake". There are six hiking trails on Hallasan of various lengths for visitors to choose. Note that even the shortest trail will take more than a few hours to complete, roundtrip.