Citadel Of Pipes (Realm 1)

What is the Citadel of Pipes?
The Citadel of Pipes, or CoP for short, is a Harder difficulty descension-based Citadel located in Realm 1. The location of the pipe is to the right of spawn, a blue or green pipe on top of a small hill. When jumped in, the pipe will teleport you into an underground portal room.

Trivia

 * The Citadel is shaped like a large pipe fading from green to gray with a Piranha Plant at the end, which is the final outside section of the Citadel.


 * This was the first Citadel to launch in this game.


 * The pipe and the Citadel itself is a reference to the several Mario games.


 * This citadel is also in Rami's Pillars of Hell: Ring 1, as Pillar of Pipes (PoP) and classic PTTT Realm 7 : Cavern, as a tower named Tower of Sewer Escape (ToSE), which used the same acronym as Tower of Smooth Edges.

Music
Portal Room: Super Mario 3D World Underground

Floors 10-7: Waterflame - Mainspring

Floors 6-4: Waterflame - Boneyard

Floors 3-1: Waterflame - Meltdown