The Treehouse was built and named by Andrew about 4 years ago. It is not in a tree but surrounded by them and it looks much like our other outhouse-style toilets that are scattered throughout the campground. From what I've read on Permies, The Treehouse is much like the willow feeder wheelie bin poopers at Base Camp. This two-stall unit was put to the test and performed magnificently 'producing' two wheelie bins each year during our event season. I'm heading to Base Camp soon for the BB20 Event and hope to learn more about what happens next as those bins will need emptying soon.