Kayan Lahwi
The tribe that inhabits two countries in Asia are very unique and known widely there. Many of the tribal people still practice the custom of putting metal rings around their necks when the females in the tribe are just little girls. Around the age of five, they get their first ring.
As the female members grow in age, more and more rings are added. This created a deformation in their bone structure and elongated the neck. Plus it gives off an extra illusion that the head is floating over the rest of the body. It is a very old practice by the tribal people.