A strange variant of the Swamp with rust-red grass and foliage. Lava pools replace water pools here. Small marks on the ground occasionally erupt into Fire Jets or columns of Smoking Blocks. The Fire Swamp is the natural home of the Hydra in the Hydra Lair.
If you are playing according to the progression system, the air in the fire swamp will be thick with flying cinders and ashes. You will be unable to enter the fire swamp without catching fire. Defeating the Minoshroom will allow you to proceed.