Muppet Castle

Muppet Castle was the base for the evil organization Organization Sesame Street XIII, located inside Elmo's World. It was full of death traps that would kill anyone non-Muppet if set off. It was owned by Elmo, the leader of the organization himself.

Formation
In order to construct the behemoth castle, Elmo hired several Muppet workers. Although they all died due to their stupidity, the castle was formed in a surprisingly short amount of time, due to Cookie Monster's time abilities that fast-forwarded the construction. It would be used as a stronghold up until the massacre that took place inside it.

Rooms
There were various rooms inside the castle. It included a massive bedroom, where organization members would rest before they were sent on missions of mass carnage, a kitchen, where the organization members would eat like pigs, a bathroom, where the organization members would do their business in public, a teleportation chamber, where the organization members would teleport to various locations to immensely cut down on commute, and a throne room, where thirteen thrones would represent the reputation of the members based on height, and also where they would sit until their butts got sore. On the roof was a clear view of Kingdom Hearts, where Elmo would beg on his knees, telling it to revive the Muppet's creator, Jim Henson.

Destruction
However, eventually the castle was breached by Sora and his companions. They killed everyone inside, namely Grover, Cookie Monster, and Zoe. They also fought Elmo there, but he went inside Kingdom Hearts to engage in a final battle with the heroes. After his death, the castle blew up into a million pieces. Nobody knows how the heck that happened, but anyways, the castle was destroyed, along with the organization that lived inside it.