L-'''Iskoll il-Kbir tal-Qroll''' (bl-[[Lingwa Ingliża|Ingliż]]: '''Great Barrier Reef''') huwa l-ikbar sistema ta’ skoll tal-qroll fid-[[Id-Dinja|dinja]]<ref>{{Ċita web|url=http://www.unep-wcmc.org/protected_areas/data/wh/gbrmp.html|titlu=Protected Areas Programme -|sit=wayback.archive-it.org|data-aċċess=2021-06-25|arkivju-url=https://wayback.archive-it.org/all/20080511100752/http://www.unep-wcmc.org/protected_areas/data/wh/gbrmp.html|arkivju-data=2008-05-11|url-status=bot: unknown}}</ref><ref>{{Ċita web|url=http://www.environment.gov.au/heritage/places/world/great-barrier-reef/values.html|titlu=World Heritage places - The Great Barrier Reef, Queensland - World Heritage Values|data=2013-05-09|sit=web.archive.org|data-aċċess=2021-06-25|arkivju-url=https://web.archive.org/web/20130509112200/http://www.environment.gov.au/heritage/places/world/great-barrier-reef/values.html|arkivju-data=2013-05-09|url-status=bot: unknown}}</ref> u huwa magħmul minn iktar minn 2,900 skoll tal-qroll individwali<ref>Hopley, Smithers & Parnell 2007, p. 1</ref> u 900 [[gżira]] estiżi fuq iżjed minn 2,300 kilometru b’erja ta’ madwar 344,400 kilometru kwadru.<ref>{{Ċita web|url=http://www.fodors.com/world/australia-and-the-pacific/australia/queensland/great-barrier-reef/|titlu=Great Barrier Reef Travel Guide {{!}} Fodor's Travel Guides|data=2013-05-14|sit=web.archive.org|data-aċċess=2021-06-25|arkivju-url=https://web.archive.org/web/20130514032401/http://www.fodors.com/world/australia-and-the-pacific/australia/queensland/great-barrier-reef/|arkivju-data=2013-05-14|url-status=bot: unknown}}</ref><ref>{{Ċita web|url=http://www.deh.gov.au/coasts/publications/gbr-marine-park-act.html|titlu=Review of the Great Barrier Reef Marine Park Act 1975|data=2006-10-18|sit=web.archive.org|data-aċċess=2021-06-25|arkivju-url=https://web.archive.org/web/20061018005108/http://www.deh.gov.au/coasts/publications/gbr-marine-park-act.html|arkivju-data=2006-10-18|url-status=dead}}</ref> L-iskoll tal-qroll jinsab fil-[[Baħar tal-Qroll]], lil hinn mill-kosta ta’ [[Queensland]], l-[[Awstralja]]. L-Iskoll il-Kbir tal-Qroll jidher mill-ispazju u huwa l-ikbar struttura unika fid-dinja magħmula minn organiżmi ħajjin.<ref>{{Ċita web|url=http://www.ga.gov.au/media/releases/2002/1013133456_20385.jsp|titlu=Geoscience Australia: Media Releases: Great Barrier Reef: no buried treasure - 08 February 2002|data=2007-10-01|sit=web.archive.org|data-aċċess=2021-06-25|arkivju-url=https://web.archive.org/web/20071001045912/http://www.ga.gov.au/media/releases/2002/1013133456_20385.jsp|arkivju-data=2007-10-01|url-status=bot: unknown}}</ref> Dan l-iskoll tal-qroll huwa magħmul minn biljuni ta’ organiżmi ċkejkin, magħrufa bħala polipi tal-qroll.<ref>{{Ċita web|url=http://archive.ph/quFj|titlu=Australia's Great Barrier REEF {{!}} Science World {{!}} Find Articles|data=2012-07-08|sit=archive.ph|data-aċċess=2021-06-25}}</ref> L-iskoll jipprovdi sostenn lil diversità wiesgħa ta’ ħlejqiet u tniżżel fil-lista tas-[[Sit ta’ Wirt Dinji|Siti ta’ Wirt Dinji]] tal-[[UNESCO]] fl-1981.<ref name=":0">{{Ċita web|url=https://whc.unesco.org/en/list/154/|titlu=Great Barrier Reef|kunjom=Centre|isem=UNESCO World Heritage|sit=UNESCO World Heritage Centre|lingwa=en|data-aċċess=2021-06-25}}</ref> Is-CNN tawh it-tikketta ta’ wieħed mis-seba’ għeġubijiet naturali tad-dinja fl-1997.<ref>{{Ċita web|url=http://www.cnn.com/TRAVEL/DESTINATIONS/9711/natural.wonders/|titlu=Destination: The Natural Wonders of the World|data=2006-07-21|sit=web.archive.org|data-aċċess=2021-06-25|arkivju-url=https://web.archive.org/web/20060721011803/http://www.cnn.com/TRAVEL/DESTINATIONS/9711/natural.wonders/|arkivju-data=2006-07-21|url-status=bot: unknown}}</ref> Il-Queensland National Trust iddikjaratu ikona statali ta’ Queensland fl-2006.<ref>{{Ċita web|url=http://www.nationaltrustqld.org/qldicons.htm|titlu=National Trust Queensland|data=2006-12-10|sit=web.archive.org|data-aċċess=2021-06-25|arkivju-url=https://web.archive.org/web/20061210082849/http://www.nationaltrustqld.org/qldicons.htm|arkivju-data=2006-12-10|url-status=dead}}</ref>