Mohole
From Kerbal Space Program Wiki
Moholes are deep holes on the surface of Moho with a depth of 4.6 km. There is only one currently known, located at Moho's geographic north pole.
They may be named after one or more of the following things:
- They are holes on Moho, so they are called "Moholes"
- They may be named after a deep well called the "Mohole" in Red Faction: Guerrilla
- They may be a reference to Project Mohole