Gibbon Fortress

The Gibbon Fortress (also known as the "Agile Fortress") is a mythological place that many believe to be the base of all gibbon species.

The story
The fortress was said to be founded by Gibbon #21 in 1988, when his gibbon species, the Agile Gibbon, were in a fierce war against the Yellow Cheeked Gibbons.

He and other members of his species built the fortress using whatever they could find. In the battle of the Green Field, the Yellow Cheeked gibbons were defeated after attempting to storm the fortress.

Today
It said the fortress is still in use to this day, and many gibbons of many species call it their home. The exact location is unknown, but in the ancient scrolls it is said the gibbons were in Spain when they built the building.

Sightings and Evidence
While many believe the fortress to be a ridiculous fairytale, the believers have produced evidence.

The Scroll
In 2006, one believe produced a scroll to the gibbon council. On it, it read "All night we build, as our enemies grow closer. Soon this fortress will be larger than the jungle top itself... and we will 

win this war - gibbon #24" 

The scroll was soon dismissed and it was soon realised that the man had written it himself, in his own handwriting.

Photograph
In early 2010, another believer came forward with what he said was a photo of the fortress. The woman was laughed at, however, as the council knew it was merely a snapshot from Sims 2.

The Box
The first possibly real evidence came from a couple of tourists who discovered a hidden box. The box contained information about the Anti-Gibbon Expedition and also a blurry photo of the fortress.