A woman from the Dani tribe holds a bow and arrow at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. The stone-age Dani tribe live a traditional existence in the Baliem Valley, which is situated 1600 metres above sea level in the heart of the Cyclops Mountains. The valley has one of the highest densities of population in Papua Province but Wamena is the only town. It is estimated that 250,000 members of the Dani Tribe live in the region. The Dani's settlements are usually located on the river banks and hill slopes of the Valley. In the settlement, they live in a structures called Honai, Eweai and Leseai. Leseai is a square shaped unit used for family gatherings, cooking and eating. Honai and Eweai are round shaped sleeping quarters without ventilation to trap heat, as it gets very cold at night. The tribe were once famed as a head-hunting tribe because they often had to fight for their territory against different villages or other tribes. They are mostly farmers and hunters and while hunting or working in the fields they will sing songs, usually accompanied by a musical instrument known as Pikon. The sound of Pikon also serves as an identification signal to a friend or an enemy. (Photo by Agung Parameswara/Getty Images)

A woman from the Dani burns sweet potatoes at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

A man from the Dani kills a pig with bow and arrow at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

People from the Dani tribe take hot stones as they prepare to cook in a traditional way at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

People from the Dani tribe burn stones at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

A man from the Dani tribe cuts the head of a pig after cooked by traditional way which is use burned hot stones at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

People from the Dani tribe cook a pig, vegetables and sweet potatoes in a traditional way, using hot stones, at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

Two women from the Dani tribe make a traditional woman hairstyle for their relative at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

A Papuanese tribal boy stands on the top of a tower during the 25th Baliem Valley festival on August 7, 2014 in Wamena, Indonesia. The Baliem Valley Cultural Festival has been organized annually in the Baliem Valley, home to three Papua interior tribes: the Dani, Lani and Yali tribes. Every year these three tribes gather together at their annual Baliem valley festival dressed in distinctive tribal attire, stage mock battles, perform traditional music and dance, and celebrate with a pig feast. In honor of the 25th anniversary running from August 6-12, 2014, the Wamena district is opening the festival and Papua culture to the outside world to promote awareness and tourism in the Baliem Valley and surrounding districts. (Photo by Agung Parameswara/Getty Images)

A Papuanese tribal boy camouflages himself in an open field during the 25th Baliem Valley festival on August 7, 2014 in Wamena, Indonesia. (Photo by Agung Parameswara/Getty Images)

A girl from the Dani tribe holds a baby at Obia Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

Boys from the Dani tribe sit on a fallen tree over a river at Soroba Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)

Numerous members of the Papuanese tribes group together for a portrait during the 25th Baliem Valley festival on August 8, 2014 in Wamena, Indonesia. (Photo by Agung Parameswara/Getty Images)

A Papuanese tribal man poses for a portrait during the 25th Baliem Valley festival on August 7, 2014 in Wamena, Indonesia. (Photo by Agung Parameswara/Getty Images)

A group of Papuanese tribal men prepare to perfrom mock battles during the 25th Baliem Valley festival on August 7, 2014 in Wamena, Indonesia. (Photo by Agung Parameswara/Getty Images)

Boys from the Dani tribe walk on a field at Soroba Village on August 9, 2014 in Wamena, Papua, Indonesia. (Photo by Agung Parameswara/Getty Images)