The Roman Baths, Bath, UK
The green waters filling this beautifully constructed bath date back to 60 AD when the Romans first “discovered” the natural hot spring, then constructed a temple and public baths over top of it. One million liters of mineral-rich water pour out of the spring every day! You can imagine the gold-mine this was to the Romans. Over the hundreds of years of usage that followed, the baths were altered and embellished. By the 1800’s, Bath had developed a reputation as a curative spring, and visitors even drank the water – Jane Austen was a frequent visitor to the city of Bath, though it seems that she disliked the city (her novel, Northanger Abbey was set in Bath and didn’t treat its setting nicely). Today, over a million people visit the baths every year, though to bathe in the water, there is a modern complex next door.
[This is also where I studied as an undergrad, and living here made me fall madly in love with England (a love still in full bloom today!) and hope one day to live here again!]