R'lyeh

R'lyeh is a fictional lost city that first appeared in the H. P. Lovecraft short story "The Call of Cthulhu", first published in Weird Tales in June 1928.

Overview
According to Lovecraft's short story, R'lyeh is a sunken city in the South Pacific and the prison of the entity called Cthulhu.

R'lyeh is characterized by bizarre architecture likened to non-Euclidean geometry. Norwegian sailor Gustaf Johansen, the narrator of one of the tales in the short story, describes the accidental discovery of the city: "a coast-line of mingled mud, ooze, and weedy Cyclopean masonry which can be nothing less than the tangible substance of earth's supreme terror—the nightmare corpse-city of R'lyeh...loathsomely redolent of spheres and dimensions apart from ours". The short story also asserts the premise that while currently trapped in R'lyeh, Cthulhu will eventually return, with worshipers often repeating the phrase Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn: "In his house at R'lyeh, dead Cthulhu waits dreaming".

Lovecraft claims R'lyeh is located at 47°9′S 126°43′WCoordinates: 47°9′S 126°43′W in the southern Pacific Ocean. Writer August Derleth, a contemporary correspondent of Lovecraft, placed R'lyeh at 49°51′S 128°34′W. The latter coordinates place the city approximately 5,100 nautical miles (9,400 km) from the actual island of Pohnpei (Ponape), the location of the fictional "Ponape Scripture". Both locations are close to the Pacific pole of inaccessibility (48°52.6′S 123°23.6′W), a point in the ocean farthest from any land mass.

In Brian Lumley's Primal Land short story "The House of Cthulhu", the island is referred to as "Arlyeh".

Charles Stross's novella A Colder War implicitly locates R'lyeh in the Baltic Sea, describing Cthulhu as being "scraped from a nest in the drowned wreckage of a city on the Baltic floor".

The Tsuburaya Productions tokusatsu series Ultraman Tiga places R'lyeh in the South Pacific, and the series' antagonist, Gatanozoa, was born there. (The name Gatanozoa is an alternate version of Ghatanothoa, a monster that appears in Lovecraft and who was identified by Lin Carter as a son of Cthulhu.)

Deep Sea Hunter
In Deep Sea Hunter 1, when the player goes close to where Cthulhu appears, there's a green hole behind Cthulhu, when Cthulhu is killed, the green hole's glow can be seen, probably being R'lyeh.

In Deep Sea Hunter 2, taking the right midnight path will guide the player to Cthulhu's sea monster cavern, where a pyramid and rock objects, probably being R'lyeh.