[[quoteright:265:[[Manga/OnePiece http://static.tvtropes.org/pmwiki/pub/images/enies_lobby_3652.jpg]]]]
[[caption-width-right:265:The pit is ''[[BottomlessPit bottomless]]'']]

An almost obligatory feature of {{Floating Continent}}s, [[OminousFloatingCastle Floating Castles]], and {{Flat World}}s, (especially if the setting is CrystalSpiresAndTogas) is waterfalls off the side of the structure. AwesomeButImpractical in the case of smaller floating islands since you'd expect the water to run out fairly quickly since they don't have a very large area of land from which to collect rainfall. It's especially strange in the case of {{Flat World}}s since it doesn't seem that there would be anything to bring the water back.
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!!Examples:

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[[folder: Anime and Manga ]]

* In ''OnePiece'', during the [=CP9=] arc, the main judicial building Robin is being held in is on a [[FridgeLogic island hanging in the middle of an abyss by a narrow section 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.

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[[folder: Film ]]

* The Hallelujah Mountains in ''Film/{{Avatar}}''.
* The secret entry to Davy Jones's locker in ''Film/PiratesOfTheCaribbeanAtWorldsEnd''.
* The edge of Asgard in ''Film/{{Thor}}''.

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[[folder: Literature ]]

* The world of ''TheChroniclesOfNarnia'' has this feature described in some detail in ''Voyage of the Dawn Treader.'' Continually sailing to the east doesn't bring you around to the west again, but to The End of the World. If you go over the edge, you end up in Aslan's Country - one of the few ways to get there without [[{{Heaven}} dying first]].
* Creator/TerryPratchett's ''Literature/{{Discworld}}'' has the ocean falling off all sides of the Disc, but "[[{{Handwave}} arrangements are made]]" (it's probably quantum). There are even people who take advantage of this and have put a net around the edge (the "circumfence") to catch floating items for salvage.
** His earlier work ''Strata'' had a different disc-world made by AncientAstronauts terraformers, which (IIRC) had a hidden system to pull the water back up.
* Played for horror in ''[[Literature/TheAdversaryCycle Nightworld]]''. Portals to AnotherDimension have opened sending nightmare creatures swarming across the Earth. Some of them open in mid-ocean, creating vast whirlpools during the day and reversing at night into mile-high fountains of water, littering the ground with dead fish and...[[TheSwarm other things]].

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[[folder: MMORP Gs ]]

* ''VideoGame/{{Aion}}'' has some of these in the aptly named Abyss.
* Outland in ''VideoGame/WorldOfWarcraft'' has both small floating islands with waterfalls on them, as well as a few places where water falls off the edge of the world.
** Also Necropoli and their derivatives in ''WorldOfWarcraft'' and ''WarcraftIII'' has slime waterfalls flowing out of them.
* {{Wizard101}} has a lot of these because of the ShatteredWorld setting.

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[[folder: Video Games ]]

* ''VideoGame/ChronoTrigger'''s Kingdom of Zeal, of course. Oddly enough, walking around on the surface of 12,000 B.C. you can't find any torrential downpours falling out of nowhere... so probably the wizards living on the floating continent [[AWizardDidIt have something worked out]].
* This appears in ''VideoGame/GoldenSun'', which has a FlatWorld.
* The ''{{Myst}}'' novel ''The Book of Atrus'' featured something like this in a small, gravity-defying Age that Catherine made. Supposedly the water falling off into the abyss turned to vapor almost instantly and rose to the top of the world, where it condensed and rained back down again, perpetuating the cycle. Atrus was having fun working out the physics behind it, Catherine just thought it was cool.
* The Beach Bowl Galaxy in ''VideoGame/SuperMarioGalaxy'' has this. On multiple levels.
* One puzzle in ''[[{{Banjo-Kazooie}} Banjo-Tooie]]'' involves removing the plug from a pool of water in Cloudcuckooland.
* These are all over the place in ''VideoGame/SkiesOfArcadia'', where TheSkyIsAnOcean but most every FloatingContinent has a river or two.
* The vaguely Sonic-like and so-cute-you'll-vomit SNES platformer ''[[http://www.youtube.com/watch?v=HYzaFSfaWAo Rainbow Bell Adventure]]'' had plenty of floating islands with waterfalls in the background.
* May appear on floating islands in ''{{Minecraft}}'' and can be intentionally created by the player using a water or lava "source block".
** However, both water and lava stop flowing when they reach the lowest layer of the created world, therefore it is advisable to build floating islands quite high for the best flowing effect.
* In ''VideoGame/TheLegendOfZeldaSkywardSword'', there is a waterfall in Skyloft that goes from a small pond in the corner of the floating island and empties out into the unknown world below.
* "VideoGame/TheElderScrollsVSkyrim" has this in Sovngarde.
* One of the Granacliffs in ''VideoGame/GrandiaII'' cuts across the ocean, resulting in this. No explanation is given for where the water goes after falling down the cliffs for thousands of years, but at the end of the game it starts filling up.

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[[folder: Western Animation ]]

* Appears at the Edge of the World in Dreamwork's ''SinbadLegendOfTheSevenSeas''.

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[[folder: Real Life ]]
* A bell-mouth spillway in a dam resevoir can look like one of these when viewed from higher up while there is water flowing into it. They look like giant holes in water's surface.

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