The scene is part of an ancient Torajan ritual known as "Ma'nene", in which clans visit the tombs of deceased family members, clean their remains and replenish the coffins with personal belongings.

"Even though she's not here physically, we still have a connection," Tumanan told Reuters as several families gathered at Loko'mata, a massive boulder in a misty, rice-terraced valley that houses the remains of dozens of people.

"It's a chance for the whole family to visit and express our love," she said, adding that the ritual was like a family reunion every few years.