Hierve el Agua in Oaxaca, Mexico looks like a beautiful waterfall, but it's not moving. Ice? No, this illusion is actually a rock formation, made of minerals left behind by dripping water. The white that makes it look like water is calcium carbonate, just one of many minerals that make up Hierve el Agua, which means "the water boils". Read about how this happened and see many more pictures at Kuriositas. Link
(Image credit: Wikipdia user Lavintzin)
The formation is quite reminiscent of those at Pamukkale in Turkey.
http://www.flickr.com/photos/twoeightnine/4248849706/
It looks "hella gay"? Gay? Really?
What are you, 12 years old?
It's pretty interesting.