“The Cliffs of Oblivion were huge cliffs on the Multifaceted Coast on planet Midnight, where the...Cliffs of Oblivion
“Ley lines were cracks and bubbles of unimaginable levels of psi energy. They were one of the...Ley line
“According to the Tenth Doctor, tar pits were responsible for humans knowing about extinct...Tar pit
“You may wish to consult mercury for other, similarly-named pages. There were mercury swamps...Mercury swamp
This category has the following 11 subcategories, out of 11 total.