Yellowstone

THE ANSWER
"Yellowstone National Park (WY, USA), Grand Prismatic Spring -- 2022 -- 2514" — Photo by Dietmar Rabich / Wikimedia Commons / CC BY-SA 4.0
The ticking time bomb of the American wilderness.
This vast area sits atop a massive volcanic caldera. It is famous for its geothermal wonders and diverse wildlife population.
Explanation
Did you know?
The park spans across three different American states.
The 5 Clues
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“It serves as a constant reminder of the volatile forces churning beneath us.”
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“The landscape is dotted with colourful, bubbling mineral pools.”
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“A predictable fountain of boiling water draws crowds to its geyser basin.”
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“It holds the title of the world's first ever national park.”
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“A vast volcanic region in the US known for Old Faithful and grizzly bears.”
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