One unique culture in Indonesia is Tiwah Ritual, a kind of ceremony to deliver the bones of a deceased person to his last resting place, which is sandung, in the hope that the one who is preached reaches heaven. This ritual is done by the Dayak tribe of Central Kalimantan, especially those who embrace the trust of Kaharingan or Hindu Kaharingan.
Tradisinya, people who died buried temporarily until tiwah held, then the body was dismantled and burned until really only the rest of the bones alone. Other events were held in the midst of tiwah rituals such as dancing, singing Dayak tribe, slaughtering sacrificial animals to install songs, not infrequently dangdut songs heard to eliminate boredom. For the Dayak community, tiwah ritual is considered a sacred ritual but along with the time of tiwah tradition has shifted the era, because the victim's family is unable to perform tiwah ritual, another factor is predicted most of the Dayak tribe to convert.
This is one of the unique cultures in Indonesia, although there are many other unique cultures, many unique cultures in Indonesia because the country is not only big, this beautiful country is also very diverse with more than 1300 ethnic and 740 local languages. Could be, this is the most diverse country of culture in the world and some very unique, and not found anywhere else in the world.