Sometimes, a bridge is called "Devil's Bridge" because it seems constructed at a high risk. Or there has been a deadly accident while building it. Or it joins two sides which had better not been joined...
I remember such a "Devil's Bridge", built of stones, but mostly out of heavy ones, since a train had to cross a valley on it. As I reached this bridge, there was no more traffic on the track, more over there were no more rails to roll on. My crossing was a bit dangerous while using the sleepers (is that right for German "Schwellen"?).
(It is nearby 50 years ago and I have no photos...)
[edit]
This could be the bridge I mentioned above:
https://www.alltrails.com/de/trail/germany/saarland/premiumwanderweg-weiselberg-gipfeltour/photos
I understand what you mean as the bridge you show looks quite dangerous.
And although it doesn't feel that way nowadays, legends say that building a bridge over this river Arda, at the place where this devil's bridge was built, was impossible. It is said that the waters of the river were extremely violent in this particular part of the river. For this, the mason had to make a pact with the devil. To me personally, this seems like a fabrication, because nowadays the water of this river is very calm. And even before the construction of this bridge, there was a Roman one here... Oops, I hope now the power won't go out again with these doubts of mine 🤭
On 2 of your photos
- this one and the next one -
one can see two things:
a) Some stabilisation of a main pillar with the ability of splitting the rush of the stream, and
b) the smoothened rocks which point to a powerful flow (at least from time to time).
I think, while snow is melting there will be a lot more of water inside the river's bed!
I guess you are right. I've never looked at things in such depth 😊