A network of caverns on Bajor in which, according to Bajoran belief, the Prophets imprisoned the malevolent Pah-wraiths, and where Benjamin Sisko's final confrontation with Dukat takes place.
The Fire Caves are deep caverns on Bajor. Bajoran scripture holds that the Pah-wraiths, false Prophets cast out of the Celestial Temple, were confined there.
They first matter in The Assignment, in which a Pah-wraith that has possessed Keiko O'Brien after her visit to the caves forces Miles O'Brien to modify the station so that it can kill the wormhole aliens.
In the finale What You Leave Behind, Dukat and Kai Winn travel to the caves with the Book of the Kosst Amojan to release the Pah-wraiths. Winn turns against Dukat at the last moment and is killed, and Sisko hurls himself and Dukat into the flames, sealing the wraiths away before the Prophets take him into the Celestial Temple.