Karlovy Vary, sometimes known in English as Carlsbad, is a spa city situated in Bohemia, the western part of the Czech Republic, on the confluence of the rivers Ohře and Teplá. Carlsbad is named after Holy Roman Emperor Charles IV, who founded the city in 1370. It is historically famous for its hot springs (13 main springs, about 300 smaller springs, and the warm-water Teplá River).

In the 19th century, it became a popular tourist destination, especially for international celebrities visiting for spa treatment. The city is also known for the Karlovy Vary International Film Festival and the popular Czech liqueur Karlovarská Becherovka. The glass manufacturer Moser Glass is located in Carlsbad.

The city has been used as the location for a number of film-shoots, including the 2006 films Last Holiday and box-office hit Casino Royale, both of which used the city's Grandhotel Pupp in different guises.