Dear All, 
thank you for all of these great and inspirational links! 
My current interest is somewhere between site-specific theatre, (built) heritage and immersive experiences. 
I will try not to repeat already shared links, so my choice for inspiration would be
http://invisiblecitiesopera.com/experience/  and
https://www.thehighline.org/photos-videos/programs-community/mile-long-opera/ 
Coming from fields of spatial design /stage/production/etc. and architecture, I am also keen on what https://www.punchdrunk.org.uk/punchdrunk/ is doing. 
wish you great discoveries and journey through this course,
best,
miljena from novi sad, serbia