10 trous fascinants

Monticello dam
http://secouchermoinsbete.fr/51918-l-etonnant-deversoir-du-barrage-de-monticello
https://en.wikipedia.org/wiki/Monticello_Dam
http://www.atlasobscura.com/places/monticello-dam

Gouffre de guatemala
http://www.atlasobscura.com/places/the-great-guatemalan-sinkhole
https://en.wikipedia.org/wiki/2010_Guatemala_City_sinkhole
http://news.nationalgeographic.com/news/2010/06/100601-sinkhole-in-guatemala-2010-world-science/

Le grand trou Kimberley
https://en.wikipedia.org/wiki/Big_Hole
http://thebighole.co.za/thebighole.php
http://www.southafrica.net/za/fr/articles/entry/article-southafrica.net-kimberley

The morning glory pool
https://www.nps.gov/features/yell/tours/oldfaithful/mrngglry.htm
http://www.usa-decouverte.com/midwest/wyoming/yellowstone_national_park/photos/290/morning_glory_pool.html
http://www.smithsonianmag.com/smart-news/tourist-trash-has-changed-color-yellowstones-morning-glory-pool-180954239/?no-ist

The Heavenly Pit / la fosse céleste
http://www.wondermondo.com/Countries/As/China/Chongqing/Xiaozhai.htm
http://virtualglobetrotting.com/map/xiaozhai-tiankeng-sinkhole/view/google/
http://tempsreel.nouvelobs.com/galeries-photos/photo/20131003.OBS9708/grand-format-ils-explorent-des-grottes-geantes-en-chine.html

Le trou noir d’Andros / the black hole of Andros
http://www.wondermondo.com/Countries/NA/Bahamas/SouthAndros/AndrosBlackHole.htm
http://geol105naturalhazards.voices.wooster.edu/the-black-hole-of-andros/
https://en.wikipedia.org/wiki/Stephanie_Schwabe

The Sawmill Sink
http://www.bahamascaves.com/research/sawmillsinkproject.html
http://natgeotv.com/ca/diving-the-labyrinth/videos/sawmill-sink
http://www.livescience.com/52521-fossil-graveyard-human-caused-extinction.html

Le forage SG3 / Kola superdeep borehole
http://www.gentside.com/forage/decouvrez-le-kola-superdeep-borehole-le-trou-le-plus-profond-du-monde_art53903.html
http://www.atlasobscura.com/places/kola-superdeep-borehole
https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole

Le trou bleu du dragon
http://www.fredzone.org/un-trou-marin-extremement-profond-a-ete-decouvert-en-chine-665
https://www.washingtonpost.com/news/morning-mix/wp/2016/07/26/researchers-just-discovered-the-worlds-deepest-underwater-sinkhole-in-the-south-china-sea/
http://www.huffingtonpost.com/entry/dragon-hole-deepest-blue-hole_us_579aeb56e4b0e2e15eb55974

Darvaza Gas Crater Turkmenistan / la porte de l’enfer
http://www.vice.com/en_uk/read/turkmenistan-has-its-very-own-gate-to-hell
https://en.wikipedia.org/wiki/Door_to_Hell
http://www.dailymail.co.uk/sciencetech/article-2179622/The-Door-Hell-Giant-hole-Karakum-Desert-40-YEARS.html