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Which waterfall system on the Argentina–Brazil border is made up of roughly 275 separate falls and cascades?
Answer
Iguazu Falls
Which waterfall system on the United States–Canada border includes Horseshoe, American and Bridal Veil Falls?
Answer
Niagara Falls
Which volcanic caldera in Wyoming formed during a supereruption about 631,000 years ago?
Answer
Yellowstone Caldera
Which Galápagos volcano is the archipelago’s highest point, reaching about 1,707 metres?
Answer
Wolf Volcano
Which Icelandic volcanic island was created by an eruption that began in 1963?
Answer
Surtsey
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Which volcanic caldera in Wyoming formed during a supereruption about 631,000 years ago?
Answer
Yellowstone Caldera
Which German volcano’s eruption about 12,900 years ago created the present-day Laacher See lake?
Answer
Laacher See volcano
Which volcano in Italy is regarded as Europe’s highest active volcano?
Answer
Mount Etna
Which volcano in Tonga erupted on 15 January 2022, producing a global atmospheric pressure wave?
Answer
Hunga Tonga–Hunga Haʻapai
Which Icelandic volcano erupted in 2010, disrupting air travel across Europe with an ash cloud?
Answer
Eyjafjallajökull