Demon Wolf's Garden

Said to be the resting place of the S-Rank wolf Fenrir. The center still lingers with its influence, creating a phenomenon where the closer you are to the center, the weaker monsters are, and the opposite holds true until the Withering Forest. In the middle lay overgrown ruins, which researchers and scholars are still investigating. Teacher woke upon a pedestal in the very center, providing him with opportunities to get stronger.

Monsters are contained within due to the Withering Forest, which drains Mana from the creatures inside.

Every couple of years, the stronger monsters in the Garden fight for territory. In effect, weaker monsters in adjacent areas are scared into aggression and flee. This endangers the highway, which is how Teacher and Fran meet Randell.

Areas
Teacher has classified the Garden into five levels, with Area 5 being where the strongest monsters are and Area 1 being where the weakest monsters are. Alternatively, the levels can be called Ranks. He woke up at the weakest place.

Area 1
Weak Goblins and other monsters populate the area.

Monsters

 * Regular Monsters: Goblins, Six-Legged Rats, Giant Centipedes, Poison Fang Rats, Carrion Vultures, Air Floaters, Orcs, Gourmet Orcs, Sabertooth Tiger, Slimelord.
 * Area Bosses:

LN Volume 1, Chapter 1; WN Chapter 1 to Chapter 15
The Demon Wolf's Garden is the location where Teacher had first appeared. With all the monsters, he used it as a way to level up. It almost seemed tailor-made for him with how monsters were weaker the closer to the pedastal.

Adaption Notes

 * In the fan translated version of the manga, it is called the Marou Plains, or Demonic Wolf Plains. In the fan translated web novel version by Ensig, it is called the Maokami Plains. In the official Light Novel, it is called the Demon Wolf's Garden.
 * Light Novel: In the surrounding scenery where Master/Teacher wakes up, there is also overgrown ruins described.