La Basilica Di San Pietro

Seeing a digital version of it in such detail only further reinforces how important it is to experience it in person.

Few sights of man-made things have instilled as much awe in me as La Basilica Di San Pietro and most of them are also in Rome (namely the Pantheon and Moses @ Basilica di San Pietro in Vincoli).

You can't understand the scale of it until you experience it in person. The way I thought of it was that it is a cathedral made for giants.