Pamukkale, Turkey
Admission: £6 ($8.55 US)
Pamukkale (“cotton castle” in Turkish) is a tiny town and UNESCO World Heritage Site in southwestern Turkey that boasts 17 of the most spectacular water terraces in the world.
The warmth of the water is not the only appealing aspect of these thermal pools, however. Equally as attractive is the striking contrast between the glistening pools and the travertine—a type of white limestone deposited by thermal waters—that makes up the surrounding mountains.
The best way to enjoy an uncrowded visit is to spend the night in Pamukkale village, then explore the formations the following morning.
There is also an Archeology Museum to learn more about Pamukkale.
Learn More: https://turkeytravelplanner.com/go/Aegean/Pamukkale/index.html
Fun Fact:
Pamukkale has been a spa since the Romans built the spa city of Hierapolis around a sacred warm-water spring. The Antique Pool is still there, littered with marble columns from the Roman Temple of Apollo and you can swim in it as the Romans once did.