Korriban

Korriban is the homeworld of the original Sith species.

In-Universe information
Korriban was the homeworld for the original Sith species and the place where its Dark lords were buried in monumental tombs after death. It is a place of great darkness and evil, the place where the dark side of the Force called the strongest. Its wildlife included the Tuk'ata and the Shyrack.