Valley of Extinction

The Valley of Extinction was a dark valley on the mysterious Wellspring of Life, the world from which midi-chlorians and life itself were born.

The valley would create illusions of those close to a being crossing through it, enticing them to stay in the valley by playing on their emotions and attachments to others. Only those who could let go of these could pass through safely.

During his quest to discover the secrets of immortality, Jedi Grand Master Yoda passed through the Valley of Extinction, which displayed itself as a hallway in the Jedi Temple on Coruscant filled with the lifeless bodies of dead Jedi. It later revealed itself more idyllically, depicting a Jedi Order untouched by the horrors of the Clone Wars, which Yoda soon realized was an illusion.

Text and facts from the “Valley of Extinction” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.