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19. Thermal Pools, Pamukkale, Turkey
Pamukkale, which means "cotton castle" in Turkish, is home to a series of naturally occurring and interlocking thermal pools and hot springs. This World Heritage Site was once an ancient Greco-Roman city called Hierapolis, or "Holy City," and has drawn weary travelers ever since.

According to legend, the formations are actual solidified cotton that giants left out to dry. How magical.

Found here.