5) He Grew Up In An Inter-Dimensional City
After his parents died when he was nine years old, Danny was taken in to the magical city of K’un Lun and raised to be the next Iron Fist.
K’un Lun itself appears to be in Tibet but is actually situated on an entirely different plane of reality. It is only accessible from Earth every ten years, from an interdimensional nexus found in Tibet.
If you really want to get into the lore of it, K’un Lun is actually built from the pieces of an alien spaceship that crashed into this other dimension millennia ago. However, its true origins have been forgotten over time. It is also one of the so-called Seven Capital Cities of Heaven. The others being Peng Lai Island, K’un Zi, Z’Gambo, Under City, Tiger Island and Kingdom of Spiders.
We don’t expect all of this to be translated to the screen, though, so just consider this important background reading.