The furnace.

There were rows of flames shooting off the ground.
There were columns of flames spurting across the walls.

Even with the most protective of gear, one can feel the heat penetrating against one's skin, the smell of the burning is almost too much to bear.

Everything about the furnace is screaming out beware, danger, do not enter.

You inch in. You inch in closer. And even closer than that.

You are on fire. You are one with the fire.

Burning, flaming.

Slowly but surely, turning into ash.
Slowly but surely, returning to where you came from.