Karlovy Vary, Czechia

Karlovy Vary (Carlsbad) is a spa city in western Czechia with 48,000 residents, nestled in a steep river valley along the Teplá River. Famous for 13 thermal hot mineral springs, ornate colonnades, Moser crystal, and Becherovka liqueur, a walk along the river promenade highlights grand 19th-century spa architecture.