I was tricked by a real-life ‘optical illusion waterfall’ that fools thousands of tourists each year – could you see it?
A natural wonder in North America has been playing tricks on the mind for thousands of years. And while it is commonly known ...
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What is a limestone landscape?
These are stalagmites and stalactites. They are also the result of water seeping through limestone, which is made of calcium carbonate. The calcium carbonate is dissolved in the water as it seeps ...
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The 'Frozen Niagara' In Mammoth Cave National Park Is A Spectacular Underground Wonder
As home to the longest-known cave system in the world, Mammoth Cave National Park is an especially apt name for this UNESCO World Heritage Site in south-central Kentucky. The natural wonder lies ...
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Pamukkale: Turkey's 'cotton castle' of white limestone that inspired an ancient cult
Travertine is a type of rock made mostly of calcium carbonate that is deposited from ... These cascade into each other, with stalactites and other limestone formations growing along ledges up ...