Vjun
'Vjun (also Vijun, or Vijjun) was a hideout for Count Dooku in the Clone Wars. He took an old woman's house and invited Jedi Master Yoda to come and save him from the Dark Side. Really being a trap, Dooku hoped to use the strong power of the Dark Side to finish Yoda, but failed when Jedi Master Obi-Wan and Anakin showed up.
Later, it was where Darth Vader's personal fortress, as shown in Star Wars Jedi Academy Bast Castle, resided. It has concentrated acid rain and the fortress is well guarded by many of Vader's best troops, including the legendary Dark Troopers. It also was the holding cell of Obi-Wan Kenobi's lightsaber after he died. The fortress has been infiltrated and attacked many times, once by Kyle Katarn with one of his apprentices, Jaden Korr. Another time was in one of the Junior Jedi Knight books where Anakin Solo, along with Tahiri, Uldir, Tionne, and Ikrit, went to recover Obi-Wan Kenobi's lightsaber.
Read more about this topic: List Of Star Wars Planets (T–V)