This graceful, well-preserved 1850s building recalls the spa town of Bath, England. Inside, the rich, carbonic Narzan Spring bubbles up inside a glass dome and spits out nearly undrinkable water – both hot and cold – into more than a dozen fountains. Never mind the foul taste; if you come here you’re obliged to have a cup, so drink up! Bottling the water is, however, forbidden. Narzan means ‘Drink of Brave Warriors’ in Turkish.