Colon Theatre - Teatro Colón - Buenos Aires, Argentina
https://goo.gl/maps/T3Yre7APFZK2
The first time that I went inside the Columbus Theatre was last year thanks to a special performance of Green Day's American Idiot play.
The theater offers paid visit tours 7 days a week and each tour has a duration of 50 minutes.
You can check more about Columbus Theatre on its official web page:
http://www.teatrocolon.org.ar/en/home/