Gateway Cavern is the easternmost cavern of the known 99 Caverns and not only serves as the home of the King Of Sling but is also a "gateway" to many great mysteries.
Locations/Landmarks[]
- King of Sling's castle
- Gateway Cavern Mines
- The Gateway~Shadow Clan territory
Appearances[]
- King of Sling (First appearance)
- Slugterra: Ghoul from Beyond
- Slugterra: Eastern Caverns
- Slugterra: Into the Shadows