Caves
Across Arrakis' surface is a vast collection of Caves and rocks tunnels, which are the natural respite for all seeking shade from the deadly heat of the sun.
The Fremen have a long history of using them to hide from the prying eyes of the Imperium and other offworlders, and many of the caves still bear echoes of their culture through wall carvings, paintings and watersealed entrances. Some caves hold a particular significance to the Fremen, such as the sacred temples of the Trials of Aql.
Caves are the primary source of Fremen components like EMF Generators and Micro-Sandwich Fabric, and often contain damaged Hydration Tools and other Fremen equipment. In addition to hostile occupants, they may also be rigged with Fire or Poison traps.
Hagga Basin
Deep Desert
Caves can be found in all sectors of the Deep Desert, both in PvP and PvE areas. However, none are particularly notable.