If I understood correctly there is an underground temple in Trento, is it called Damanhur? Has anyone been there?
Everything I know I get from Wikipedia. They say it is in far western Italy near Gran Paradiso National Park.
Greetings! The underground temple is called the "Temples of Humankind" and it is located in northern Italy, as part of the community of Damanhur. You can find Damanhur and the Temples pretty easily online. I live in the community, so let me know if you have any questions.