The Lava Caves are a cave system below Monagham. They can be accessed from the elevator in Monagham if the player possesses the Elemental Key of Nature, Elemental Key of Earth and the Elemental Key of Fire. However, the player needs the Fairy card of Fire and an active fire fairy (e.g. Tinezard) to safely walk around in this area. An air fairy and the Fairy card of Air are also needed to enter the cave. Several crystals, Elemental Stones of Fire and other useful items can be found here. Its also the only place where fire fairies can be caught.
The following fairies can be found here: