Smilodon Cave

In the Tundra area, there is a secret passage, leading to a large den. The den has several deer, or prey, bones scattered around the floor. There is even a Saber Tooth cat skull collectable. Once you enter the den, the sky seems to get darker. Simular to the flood, thunderstorms, or the wolf attacks. But once you exit the den, the sky gets lighter. Something to be noted, there are several rusty deer bones, larger than the regular deers' bones, laying across, or in the middle, of a creek in the Tundra territory.

Myth about the Saber Tooth cat:

Long ago, a Saber Tooth cat had dominated the land. Not even the wolves or bears could chase him away. He was a relentless predator, who would kill whatever he wanted. The remains of his victims can be found not only in his den, but in the South Eastern part of the Tundra. Following the river in the Tundra will lead you to multiple deer skeletons. They were most likely the fanged cat's victims. No one knew what happened to him, but one day he disappeared from the vast area. Never to be seen again. Ever since then, no one would dare to come to his den. Not even the wolf pack dared to come here. When you enter, his skull is found in the middle of his victims skeletons.