Minecraft wiki entry for Nether_Fortress, associated text: Some nether warts found at a stair.
Demonstration of the pathway architecture and its ability to cut through netherrack.
The blaze spawner room.
The abrupt end of an inside corridor.
Broken walkways.
A large amount of corridors. Notice how corridors do not develop arches in their supports.
A ghast that has spawned inside of one of the larger rooms.
A player in a fortress with another nether fortress across from it.
A fortress with another one generated on top of it.
The lava well room.
A fortress in a warped forest.
A fortress in a crimson forest.
A fortress in a basalt deltas biome.
A large nether fortress.
A blaze on fire, preparing to attack.
A flying blaze ready to attack.
A blaze and a wither skeleton idling in a fortress.
A blaze and a wither skeleton next to a blaze spawner.