The Hideout (Selat, Bali/ Indonesia)

The Hideout lies in the mountains of Gunung Agung volcano and was built and handcrafted in 2015. Nestled by the riverside inbetween rice fields the bamboo house is a unique eco stay for adventurous travellers who want to experience rustic Balinese village life.

Chicken Church "Gereja Ayam" (Magelang, Java/ Indonesia)

This building in the jungle of central Java is known as 'Gereja Ayam' - or Chicken Church, however according to its creator - Daniel Alamsjah, 67 - it's supposed to be the shape of a dove. He built the structure in 1990 after he had a vision from God to build a 'prayer house' atop a hill. It shut its doors in 2000 because the construction costs were too high, but that doesn't stop hundreds of curious travelers and worshipers from many different religions to travel to Indonesia to see it every year.
Visitors need to take caution once they are inside because the abandoned building is very unstable. The local villages that helped Alamsjah build the Chicken Church now benefit from the increased tourism it has created by charging for parking nearby etc.

Panchoran Retreat (Ubud/ Bali/ Indonesia)

Yes this place is real! Situated on riverside land nearby Ubud in the rolling hills of Nyuh Kuning Village, Bali, this retreat has a strong focus on nature and bamboo. There's 5 individual houses for rent.

Korowai treehouses (Papua/ Indonesia)

The Korowai are a people of southeastern Papua (i.e., the southeastern part of the western part of New Guinea).
The majority of their clans live in tree houses. They often have wars amongst themselves and one of the main reasons they live in trees is for self-protection.