K'un-Lun is a mystical lost city located in a different dimension, and one of the Seven Capital Cities of Heaven. The gate to K'un-Lun can be accessed in China every 15 years. The Iron Fist serves as the guardian of the gate and K'un-Lun's protector and destroyer of the Hand. After he lost his family in an expedition, Danny Rand was raised by the inhabitants of the city.
It would appear, however, that the Iron Fist may be the key to reopening the dimensional gate/portal to K'un-Lun, as the Hand's main goal was to obtain the Iron Fist and return to K'un-Lun.
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- There are veiled references to K'un-Lun in Daredevil:
- In the episode The Ones We Leave Behind, Madame Gao tells Leland Owlsley that she is returning to her homeland to reflect on the future. When he asks if she means China, she replies that it is "a considerable distance further".
- In the episode Kinbaku, an article on the New York Bulletin read by Foggy Nelson refers to a "lost city".