Gronkloft

Enormous monster, easily mistaken for being a valley, rather than a creature. Only two of these monsters have ever been reported, which is especially peculiar due to its enormous size. It is as wide as a valley and as long as the highest known mountain is tall. It has no eyes or ears, presumingly only having one sense, being the sense of feeling. It's mouth is located along its back, being the part of it that resembles a long, stony rift formation. It captures its prey by burrowing itself into the ground, opening it's mouth and taking on the shape of a canyon. Sometimes it lays dormant for years, apparently not needed much nourishment to survive.