Splinterback Cavern is a cavern in The 99 Caverns. It is officially introduced in Slugterra: Into the Shadows. It was where Eli Shane taught Tad how to bond with slugs. It was also where Locke and Lode robbed a truck filled with gold that was going to be use to build an orphanage, however, their plan was foiled by Eli and Tad.
- Slugterra: Into the Shadows (First appearance)