About halfway through the Tiger Temple track (marked on your map) is large stoneface in a wall on the left. Shoot any weapon other than a TNT/Nitro Crate or turbos at the mouth of the face, or have an Aku-Aku/Uka-Uka. The mouth will open and you can drive straight through the shortcut. You can also do this if you have a Shield. If a TNT/Nitro is placed on the mouth when open, it will stay open until destroyed. In Relic Race, it is stuck open for convenience.
Some fans mistake this track as being Tiny Tiger's home track due to the track's misleading name. They are confusing this with Tiny Arena, which is Tiny's actual home track.