The Most Basin is a structural basin and geomorphological mesoregion of the Czech Republic. It is named after the city of Most. It forms the southwestern and central parts of the Ústí nad Labem Region. It is among the richest European deposits of lignite, which has been extracted here since the second half of 19th century, mostly by extensive surface mining.

Žatec is a town in Louny District in the Ústí nad Labem Region of the Czech Republic. It has about 19,000 inhabitants. It lies on the Ohře river. Žatec is famous for an over-700-year-long tradition of growing Saaz noble hops used by several breweries. Žatec and the Landscape of Saaz Hops was included in the UNESCO World Heritage List in 2023. The historic town centre is well preserved and is protected by law as an urban monument reservation and partly also as an urban monument zone.