"Mt. Krackyourbigtoa" is a volcano from the episode "The Liar". It is the main location of the episode, and Wander and Sylvia's job is to take out the people inside of it.
Mt. Krackyourbigtoa looks like the average volcano: a huge conical mountain. At the top, it looks like It's spewing some lava or magma, and It's surrounded by some bushes and what appears to be an island.