Compléter Amazing Natural Wonders Version en ligne Fill the blanks, par Elsa Lisseth Chávez Orellana 1 __rock______________________ ____________health____________ _______________crater_________ _________icebergs_______________ __________________waterfalls______ _________coast_______________ ______________________springs__ ___pond ____________geyser____________ ________________desert________ _____________field ______walkways ____ocean _________lakes_________ ? once the Roman equivalent of a spa , the spectacular rock formations below the ancient city of Hierapolis form . formed due to mineral , rich water from ancient hot spilling down the hillsides for millennia . ? you will find the world's largest salt flat , which is formed as a result of transformations between several prehistoric . ______ These colorful and whimsical formations standing horseshoe shaped amphitheaters along the eastern edge of the . _____________________ ? sitting on the edge of the Oregon is what appears to be a gaping sinkhole that never seems to fill despite the unbroken of ? The well is actually a hole in the that only appears to drain water from the . ____________________ number 6 , the door to hell , Turkmenistan the door to hell is a natural gas . ___________ ? the which is 69 meters wide and 30 meters . Fill the gap : Number five , striped Antarctica . Fill the gap : ? geological structure combined with long - term conditions , ? which tumble into each other through a series of and cascades . The lakes can be explored via , Interestingly , this isn't entirely natural , but it was formed by accident . the sinkhole originally formed as a limestone _____________cave___________ during the last glacial period a time when sea levels were much lower as the ?
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