The 1815 eruption produced 60 megatons of sulfur, and as a result, average global temperatures dropped by around 3°C (5.4°F).
Travel + Leisure on MSN
I've Visited 40+ National Parks in the U.S.—and This Lesser-known One With a 'Glass Mountain' Is One of My Favorites
Capitol Reef National Park in Utah is home to Glass Mountain, a 15-foot mound made of selenite and hidden deep in the desert. Here's how you can visit the formation.
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