Mud pit

Lav'oti V

Paris after falling in the mud pits

A mud pit was a hollowed-out, muddy area of ground.

Palomar, a location on the planet Lav'oti V, was known for its fetid mud pits. In 2375, The Doctor exhibited a holophoto of Tom Paris, who had fallen into the pits. He claimed to have been pushed. (VOY: "Nothing Human")