Karlovy Vary is a spa city situated in western Bohemia, Czech Republic, on the confluence of the rivers Ohře and Teplá, approximately 130 km (80.78 miles) west of Prague. The riverside spa district is home to several colonnades with columned walkways. It is named after King of Bohemia and Holy Roman Emperor Charles IV, who founded the city in 1370. It is historically famous for its hot springs.