Editing Cliff (section)

==Large and famous cliffs==
{{More citations needed section|date=March 2017}}
[[File:Vihren North face.JPG|thumb|upright|[[Vihren]]’s 460 m north face seen from [[Golemiya Kazan]], [[Pirin]] Mountain, [[Bulgaria]]]]
[[File:TalusConesIsfjorden.jpg|thumb|Cliffs along the north shore of [[Isfjord (Svalbard)|Isfjord]], [[Svalbard]], Norway.]]
[[File:Nos Kaliakra.jpg|thumb|[[Kaliakra]] cape cliffs, [[Bulgaria]]]]
[[File:Matengai of Kuniga Coast in Oki Island Shimane pref600.jpg|thumb|right|The Matengai in [[Oki Islands]], Japan]]
[[File:Ireland cliffs of moher2.jpg|thumb|right|The [[Cliffs of Moher]] in Ireland]]
[[File:Baffin Island Northeast Coast 1997-08-07.jpg|thumb|Cliffs on the western shoreline of [[Sam Ford Fjord]], Canada]]
[[File:Ruskeala park.jpg|thumb|right|Cliffs near [[Sortavala]], Russia]]
[[File:Miranda scarp.jpg|thumb|Close-up view of [[Verona Rupes]], a 20 km high [[fault scarp]] on [[Miranda (moon)|Miranda]], a moon of Uranus.<ref>{{cite web|url=http://www.guinnessworldrecords.com/world-records/1000/highest-cliffs-in-the-solar-system|title=Natural world: the solar system: highest cliffs|publisher=[[Guinness World Records]]|access-date=2014-11-16 |archive-url = https://web.archive.org/web/20060521223224/http://www.guinnessworldrecords.com/content_pages/record.asp?recordid=54819 |archive-date = 2006-05-21}}</ref>]]
[[File:Vratsata gorge.JPG|thumb|Vratsata gorge, Vrachanski [[Balkan Mountains]], [[Bulgaria]]]]

Given that a cliff does not need to be exactly vertical, there can be ambiguity about whether a given [[Slope (land)|slope]] is a cliff or not and also about how much of a certain slope to count as a cliff. For example, given a truly vertical rock wall above a very steep slope, one could count just the rock wall or the combination. Listings of cliffs are thus inherently uncertain.

Some of the largest cliffs on Earth are found underwater. For example, an 8,000 m drop over a 4,250 m span can be found at a ridge sitting inside the [[Kermadec Trench]].

According to some sources, the highest cliff in the world, about 1,340 m high, is the east face of [[Trango Towers|Great Trango]] in the [[Karakoram]] mountains of northern Pakistan. This uses a fairly stringent notion of cliff, as the 1,340 m figure refers to a nearly vertical headwall of two stacked pillars; adding in a very steep approach brings the total drop from the East Face precipice to the nearby Dunge Glacier to nearly 2,000 m.

The location of the world's highest sea cliffs depends also on the definition of 'cliff' that is used. ''Guinness World Records'' states it is [[Kalaupapa, Hawaii]],<ref>{{cite web
 |title=Highest Cliffs 
 |url=http://www.guinnessworldrecords.com/content_pages/record.asp?recordid=47602 
 |access-date=2006-05-02 
 |publisher=Guinness World Records 
 |archive-url=https://web.archive.org/web/20051127032740/http://www.guinnessworldrecords.com/content_pages/record.asp?recordid=47602 
 |archive-date=2005-11-27 
 |url-status=dead 
}}</ref> at 1,010 m high. Another contender is the north face of [[Mitre Peak, New Zealand|Mitre Peak]], which drops 1,683 m to [[Milford Sound]], New Zealand.<ref>{{cite book
 |title       = The Encyclopedia of Tourism and Recreation in Marine Environments By Michael Lück
 |isbn = 9781845933500|url         = https://books.google.com/books?id=Yuc2Aro6ukkC&pg=PA177
 |access-date  = 2009-08-01
 |url-status     = live
 |archive-url  = https://web.archive.org/web/20171206203741/https://books.google.com/books?id=Yuc2Aro6ukkC&pg=PA177&lpg=PA176
 |archive-date = 2017-12-06
|last1 = Lück|first1 = Michael|year = 2008}}</ref> These are subject to a less stringent definition, as the average slope of these cliffs at Kaulapapa is about 1.7, corresponding to an angle of 60 degrees, and Mitre Peak is similar. A more vertical drop into the sea can be found at Maujit Qaqarssuasia (also known as the '[[Thumbnail (cliff)|Thumbnail]]') which is situated in the [[Torsukattak Strait|Torssukátak]] fjord area at the very tip of South Greenland and drops 1,560 m near-vertically.<ref>{{cite web
 |title=Planet Fear 
 |url=http://www.planetfear.co.uk/articles/Greenland_New_Route_on_Thumbnail_926.html 
 |access-date=2009-08-04 
 |url-status=dead 
 |archive-url=https://web.archive.org/web/20120326194407/http://www.planetfear.co.uk/articles/Greenland_New_Route_on_Thumbnail_926.html 
 |archive-date=2012-03-26 
}}</ref>

Considering a truly vertical drop, [[Mount Thor]] on [[Baffin Island]] in Arctic Canada is often considered the highest at 1370&nbsp;m (4500&nbsp;ft) high in total (the top 480&nbsp;m (1600&nbsp;ft) is overhanging), and is said to give it the longest vertical drop on Earth at 1,250&nbsp;m (4,100&nbsp;ft). However, other cliffs on Baffin Island, such as [[Polar Sun Spire]] in the [[Sam Ford Fjord]], or others in remote areas of Greenland may be higher.

The highest cliff in the [[Solar System]] may be [[Verona Rupes]], an approximately {{convert|20|km|mi|abbr=on}} high [[fault scarp]] on [[Miranda (moon)|Miranda]], a moon of Uranus.