cyclopean ruins
basalt citadel
coral castle
ossuary temple
black monolith
dolmen circle
coral castle
vaulted catacombs
palace of sallow bone
glimmering crag
cavernous abyss
eldritch city
alien planetscape
plutonian landscape
stygian void
The Great Old Ones city R'lyeh
Sunken city of Atlantis
The Plateau of Leng
The Dreamlands
Arkham
Innsmouth
Dunwich
Kingsport