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9 of the world's most relaxing hot springs

The Great Bath in Bath, Somerset, UK

Photo: Tamara Kulikova/Shutterstock

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Bath, U.K.

Geothermal springs run under this historic city in England. These waters played an important role in the city's colorful history. During the time of the Roman Empire, the naturally heated water was pumped into bathhouse pools. One of these ancient “spas” still stands today and tourists can see the real Roman baths for themselves. The ancient pools are surrounded by exhibits that put them into context. Bath's springs have been used at other times in England's past as well. Today, the new Thermae Spa offers visitors a chance to soak in the historic 95-degree waters in a state-of-the-art complex.