Complex sentence: 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 a UNESCO World Heritage Site since 2012.
Split into simpler sentences: 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.