History Main / SeaSinkhole

* One of the unlockable friend areas in ''VideoGame/PokemonMysteryDungeonRescueTeam'' is the "Enclosed Island," which houses Deoxys. It appears as a [[http://cdn.bulbagarden.net/upload/6/6e/Enclosed_Island.png rocky outcropping in the center of a circular waterfall]] with a single narrow path leading off screen.

* ''{{Literature/Redwall}}'': The Roaringburn current ends in a massive whirlpool called the Green Maelstrom. Finbarr tricks a ship of searats into sailing straight into it, something even the other heroes find disturbing.

* [[https://www.google.com/search?q=bell+mouth+spillway&safe=active&rlz=1C1CHFX_enUS591US591&source=lnms&tbm=isch&sa=X&ved=0ahUKEwifib2O8JrTAhUlxYMKHVxjA4AQ_AUIBygC&biw=1296&bih=916 Bell-mouth spillways]] found in reservoirs around the world. When the water level is low, the top of the spillways look like inverted trumpet bells stick out of the water. When the water level is high, it looks like a hole has opened up in the surface of the water.
** One of the image sources is by the [[https://en.wikipedia.org/wiki/Monticello_Dam Monticello Dam]] in California.

* Literature/TheAdversaryCycle. Played for horror in ''Nightworld'' where portals to AnotherDimension have opened sending nightmare creatures swarming across the Earth. Some of them open in mid-ocean, swallowing ocean liners and creating vast whirlpools during the day and reversing at night into mile-high fountains of water, littering islands with dead fish and...[[TheSwarm other things]].

* [[https://www.google.com/search?q=bell+mouth+spillway&safe=active&rlz=1C1CHFX_enUS591US591&source=lnms&tbm=isch&sa=X&ved=0ahUKEwifib2O8JrTAhUlxYMKHVxjA4AQ_AUIBygC&biw=1296&bih=916 Bell-mouth spillways]] found in reservoirs around the world. When the water level is low, they look like inverted trumpet bells stick out of the water. When the water level is high, it looks like a hole's opened up in the surface of the water.

* In ''VideoGame/GuiltyGear'', this is what Japan has become after getting wiped off the face of the Earth by the command-type Gear Justice. It's especially noticeable as a stage in ''Xrd''.

Sister trope to WaterfallIntoTheAbyss, in which water cascades from a seemingly inexhaustible source off the side of a FloatingIsland or the edge of a FlatWorld. Also related to MegaMaelstrom, which is mother nature's version of this but [[SpectacularSpinning with spinning]] . Can lead to an InevitableWaterfall moment, even in the middle of an ocean.

Sister trope to WaterfallIntoTheAbyss, in which water cascades from a seemingly inexhaustible source off the side of a FloatingIsland or the edge of a FlatWorld. Also related to MegaMaelstrom, which is mother nature's version of this but [[EverythingsBetterWithSpinning with spinning]] . Can lead to an InevitableWaterfall moment, even in the middle of an ocean.

* In ''WesternAnimation/AdventuresOfTheGummiBears'' episode ''My Gummi Lies Over the Ocean'', Gruffi and Tummi are stranded on [[https://s-media-cache-ak0.pinimg.com/736x/7c/54/b4/7c54b4898898824ae8ae11d96b3f0a6a.jpg an island in the middle of a hole in the ocean, surrounded by falling water]]. Unlike other examples, the water is filling up the hole, threatening to sink the island; our heroes -- and a third Gummi, Gusto, who was stranded years before -- have to figure out [[RisingWaterRisingTension how to get back home before it does]].

* ''Manga/OnePiece'': During the Enies Lobby arc, the main judicial building Robin is being held in is on Enies Lobby, [[{{Bizarrchitecture}} an island hanging in the middle of an abyss by a narrow strip of land far too frail to actually support it]]. The abyss is in the middle of the ocean, which drains eternally into this bottomless pit.

* The National 9/11 Memorial features two recessed rectangular "reflecting pool" fountains set in the footprints of the Twin Towers. At the center of each pool is a smaller square waterfall that seems to disappear underground. The edges of the larger pools themselves are are much taller waterfalls that cascade inwards.

[[folder: Anime & Manga ]]

* During the Enies Lobby arc of ''Manga/OnePiece'', the main judicial building Robin is being held in is on Enies Lobby, [[{{Bizarrchitecture}} an island hanging in the middle of an abyss by a narrow strip of land far too frail to actually support it]]. The abyss is in the middle of the ocean, which drains eternally into this bottomless pit.

[[folder: Video Games ]]

* The Treacherous Mansion, from ''VideoGame/LuigisMansionDarkMoon'' miraculously stands on a very precarious rock in the middle of a giant sea sinkhole.

[[folder: Western Animation ]]

* The [[http://steven-universe.wikia.com/wiki/Lunar_Sea_Spire Lunar Sea Spire]] from ''WesternAnimation/StevenUniverse'' episode "[[Recap/StevenUniverseS1E3CheeseburgerBackpack Cheeseburger Backpack]]" appeared as an intricately designed tower at the center of a watery sinkhole somewhere in the Northwest Atlantic ocean, glowing with an unnatural light that underscored the mystical nature of the structure. As the episode begins it is revealed that centuries of neglect have taken their toll on the structure, and the mechanism that has kept the waters from closing in on the tower is about to fail. Pearl mentions that the "moon goddess" statue that was taken from the top floor of the spire is the only thing that can reverse the damage and save the spire from destruction... but the Crystal Gems are ultimately unable to return the statue to the spire, and must beat a hasty retreat as the sea sinkhole closes up and the structure is swallowed by the waves.

[[folder: Real Life ]]

* The [[http://steven-universe.wikia.com/wiki/Lunar_Sea_Spire lunar sea spire]] from ''WesternAnimation/StevenUniverse'' episode "[[Recap/StevenUniverseS1E3CheeseburgerBackpack Cheeseburger Backpack]]" appeared as an intricately designed tower at the center of a circular waterfall somewhere in the Atlantic ocean. After centuries of neglect, the mechanism that keeps the water from closing in on the tower is about to fail. Pearl mentions that the moon goddess statue that belongs on the top floor is the only thing that can save the spire, but the Crystal Gems ultimately fail in replacing the statue in time and have to watch as the spire is swallowed by the waves.

Sister trope to WaterfallIntoTheAbyss, in which water cascades from a seemingly inexhaustible source off the side of a FloatingIsland or the edge of a FlatLand. Also related to MegaMaelstrom, which is mother nature's version of this but [[EverythingsBetterWithSpinning with spinning]] . Can lead to an InevitableWaterfall moment, even in the middle of an ocean.

[[AC: Anime & Manga]]

[[AC: Video Games]]

[[AC: Western Animation]]

[[AC: Real Life]]
* [[https://www.google.com/search?q=bell+mouth+spillway&safe=active&rlz=1C1CHFX_enUS591US591&source=lnms&tbm=isch&sa=X&ved=0ahUKEwifib2O8JrTAhUlxYMKHVxjA4AQ_AUIBygC&biw=1296&bih=916 Bell-mouth spillways]] found in reservoirs around the world. When the water level is low, they look like inverted trumpet bells stick out of the water. When the water level is high, it looks like a hole's opened up in the surface of the water.

* Yoshi Falls, a racetrack in both ''VideoGame/MarioKartDS'' and ''VideoGame/MarioKartWii'', is a circular track with waterfalls that continuously send water in the middle track, without any way for the water to get out.

* The Treacherous Mansion, from ''VideoGame/LuigisMansionDarkMoon'' miraculously stands on a very precarious rock in the middle of a giant sinkhole.

* In ''WesternAnimation/AdventuresOfTheGummiBears'' episode ''My Gummi Lies Over the Ocean'', bears Gruffi and Tummi are stranded on [[https://s-media-cache-ak0.pinimg.com/736x/7c/54/b4/7c54b4898898824ae8ae11d96b3f0a6a.jpg an island in the middle of a hole in the ocean, surrounded by falling water]]. Unlike other examples, the water is filling up the hole, threatening to sink the island; our heroes - and a third Gummi, Gusto, who was stranded years before - have to figure out [[RisingWaterRisingTension how to get back home before it does]].

* The National 9/11 Memorial features two rectangular "reflecting pool" fountains. At the center of each pool is a small square waterfall, while the edges of the pools are much taller waterfalls that cascade inwards, The fountains are set in the footprint of the twin towers.