“The Columbia Plateau was a geologic feature in at least the American state of Oregon. At one...Columbia Plateau
“The Outland was over forty miles south of Christmas, separated by a trackless wilderness. It...Outland
“According to the Tenth Doctor, tar pits were responsible for humans knowing about extinct...Tar pit
“There were mercury swamps located on the planet Vulcan. They contained rocks and pools of...Mercury swamp
“As Pete Manson once noted to himself whilst in the environs of Middletown, moorland was wild...Moorland
“Devil's Elbows Canyon was a Z-shaped passage divided between Fafnir's Crest and Tundra-Vald...Devil's Elbows Canyon
This category has the following 11 subcategories, out of 11 total.