The Pantheon in Rome (temple of all Gods)

The oculus is the main source of light inside the Pantheon and they say that even during heavy rains not a single raindrop reaches the bottom. Sounds like some kind of miracle!
By taking a closer look at the floor though, you will notice a slight bending allowing the water to flow towards the walls where it eventually drains.
Sorry if I spoiled the mood, I wanted to believe in it so badly too! Yet there is still a lot of open questions on how they managed to build this majestic dome….