Idrija (pronounced ; Italian and German: Idria) is a town in western Slovenia. It is the seat of the Municipality of Idrija. It is located in the traditional region of the Slovenian Littoral and is in the Gorizia Statistical Region. It is notable for its mercury mine with stores and infrastructure, as well as miners' living quarters, and a miners' theatre. Together with the Spanish mine at Almadén, it has been a UNESCO World Heritage Site since 2012. In 2011, Idrija was given the Alpine Town of the Year award.