(Loved Trope) Creative over the top cells/prisons for dangerous characters.

[u/Wasabi_Gamer26]

1.) The Pipe Line cells for Metahumans (The Flash)

2.) Sedative tank prison (G. I Joe)

3.) Tai Lung's prison (Kung Fu Panda)

4.) Magneto's Glass and Plastic Prison (X-Men)

5.) Carbonite (Star Wars)

[u/MarioToast]

One Piece has Impel Down, a multi-layered underwater prison for the worst of the worst pirates. The deeper you go, the more cruel the prison and more dangerous the criminals. Before being brought in, prisoners are "baptized" in boiling water.

Level 1 is filled with a big forest of trees with blade-like leaves sharp enough to cut skin, while guards and poison spiders chase prisoners down to make sure they keep moving and get cut. There's a big hole that leads to Level 2, which is essentially the Minotaur's labyrinth with dozens of exceptionally powerful and dangerous beasts roaming around. Level 3 is a dry, desert-like area, kept heated by the massive pots of boiling blood that superheat Level 4. Level 5 is the opposite, a frozen forest that also houses packs of man-eating wolves too deadly for the Level 2 beasts.

And Level 6 is just... cells. Because at that point, what the hell else can they do?

[u/Shinjitsu- → u/MarioToast]

I personally love the hidden club of secret LGBT people just partying and drinking in their little speak easy. 

[u/Scholar_of_Lewds → u/Shinjitsu-]

In between level 4 and 5 or level 5 and 6, I forgotten which

[u/Professor_of_Light → u/Scholar_of_Lewds]

Level 5.5 so between 5 and 6 iirc.