Here’s a restaurant in an old mountain village; part of the restaurant is in a cave sculpted out of the rock by the Etruscans.
http://www.almacivita.it/ristorante.php
link came from here:
https://www.cnn.com/travel/article/entry-fee-civita-di-bagnoregio-italy/index.html
I enjoyed this, but those who understand Italian will get more out of it that I did. I picked up a few things based on the context of the view, such as the ancient terracotta pipes.
Bagnoregio Underground
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Feb 11, 2017
Museo Geologico e delle Frane
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MOSTRA BAGNOREGIO UNDERGROUND, a cura del Museo Geologico e delle Frane. Palazzo Alemanni, Civita di Bagnoregio (VT)
https://www.youtube.com/watch?v=0QYtwy10qD8