Eriador

Eriador is a huge land of rolling, grass plains. It is similar to the vanilla plains biome, other than the fact that it is even flatter and has the occasional oak, birch, or beech tree. Tall grass and flowers are widespread here, and Rangers of the North protect against Orcs.

Eriador Downs
The Eriador Downs are similar to the Eriador Biome, except they contain rock boulders and Ruined Dunedain Towers.

Eriador Woodlands
A forest biome with much more trees than Eriador. The ground has sometimes fields of Podzol or dirt (without grass) to make the appearance of forest ground.

Eriador Dense Woodland
Similar to Eriador Woodlands but the forest here is so dense, that is even difficult to pass them.

Structures
The Ruined Dunedain Tower will sometimes spawn in the downs of Eriador. Orc Camps and Ranger Camps will also rarely spawn.

Mobs
At night, Gundabad Orcs spawn and the Rangers of the North, which spawn at any time of day or night, try to keep them at bay. The customary Wild Boars, Cows, Chickens, and Sheep also spawn here.