Sith cave

"Mustafar is not like other planets. It is unique. Deep beneath its surface rests a locus for the dark side of the Force."

- Darth Sidious

A Sith cave was located on the Outer Rim planet Mustafar. A place strong with the dark side of the Force, the newly-christened Sith Lord Darth Vader traveled to the Sith cave to "bleed" a kyber crystal in order to construct his own lightsaber. Later, a castle was built over the ancient cave, which would serve as a personal residence to Darth Vader.

Appearances

 * Darth Vader: Dark Lord of the Sith 5: The Chosen One, Part V