OMG I thought i was the only one or that this was intended.
It mostly appears on the minor landmarks,such as small churches or squares,but it indeed was annoying during the enigmas.
It doesn't matter how many times i visited the same spot,still just "Landmark".
I wish they'd fix it as soon as possible.
I came searching for this exact thing. I can't get the landmark that appears to be a crossroads where prostitutes meet (based on Nostradamus enigma clue), I can't get what appears to be twin churches in the inner-north east and I can't get what appears to be a large square tower that's close to those churches.
It's extremely frustrating.