The critical working conditions that Lota miners lived in were immortalized in the 1904 book Subterra, by Chilean writer Baldomero Lillo, which has been represented on the big screen in the film of the same name, directed by Marcelo Ferrari and starring Francisco Reyes and Paulina Gálvez in 2003. On October 6, 2009, the mine was declared a National Monument of Chile, under the category of Historic Monument. The mine can be visited in guided tours with still some of the original workers. One will also see the houses where the workers have lived, the museum on the history of Lota and the very nice Parque Isidora Cousiño.
Here more information in Spanish.