It was used as a curfew warning for Park City's young people until 1980 but you can still hear the siren sound every night at 10 p.m.
Initially, a 1,500 pound bell was installed to alert the community to future fires. In 1905 the bell was replaced by an electric siren activated from the telephone company's switch board.
It became known as the "Ten O'clock Whistle", as the fire department performed a daily check at 10 p.m. - to ensure the siren worked.
Park City is a pretty special place. But how well do you really know PC? Whether you live here year-round and are in town for a fun weekend, here are 20 fun facts for you to enjoy shared by Insideparkcityrealestate.com.