Mount Ebott

Mount Ebott was a mountain on the surface of the Earth. There was a cave at the top that led to the Ruins. Being the only known point of entry to the Underground, there was a legend that those who climbed it never returned.

History
After the War of Humans and Monsters, humans chose Mount Ebott to seal monsters under, most likely due to the large, empty cavern already beneath it.In the year 201X, Chara climbed Mount Ebott and fell into the Underground. They were the first of many humans to meet that fate.

Geography
At an unknown area on Mount Ebott, there was a cave, presumably covered in vines, that consisted of nothing but a large hole. Entering that hole was a larger cave that stretched miles beyond the mountain itself, home to the Kingdom of Monsters.