Doldam

[1] Stones are traditionally piled without adhesives; it is considered a skill to be able to create structures using gravity and the angular shapes of the rocks that can resist Jeju's typhoon winds.

This phenomenon has prompted some negative reactions, with some describing the walls as less resilient to wind and not following cultural wisdoms built over generations.

[3][4] Piled stones for demarcating boundaries are called ujatdam (우잣담), ureotdam (우럿담), or uldam (울담).

The action of building a piled stone wall around a house is called uldam dureuda (울담 두르다).

[3][4] Walls made of small stones are called jatbaek (잣벡), jatbaekdam (잣벡담), or jatdam (잣담).

[3] Piled stone structures called wondam (원담) were also used in the water for trapping fish during low tide.

[3][1][2] Doldam barriers were used to protect the coastline from foreign invaders such as wokou (waegu in Korean; Japanese pirates);[6] some of these structures still remain.

[3] While modern building techniques have resulted in some decline in the usage of these stone structures, there are conscious efforts to maintain and preserve them as part of the island's aesthetic and culture.