GhibliCraft

There is a glitchy map (map_7598) at the coordinates -407.50 104.50 -807.97 (Spirited Away map).   It draws and updates that map when you fly around with it in your hand.

Another glitched map is at 3961.97 141.50 -3213.50 (at /warp Howls_Castle, map_9010). The  minecraft:armor_stand at 3956.53 140.20 -3228.96 is wearing a player head with a missing texture.

There are possibly many other maps and armorstand playerheads in the world that are like this.