The Duomo in Milan, Italy is amazing!
I'm a fan of European cathedrals, because they are usually pretty gorgeous, large and architecturally interesting. The Duomo in Milan is no exception. The facade is stunning and you can of course take tours inside. You can also get on the roof which is a pretty amazing experience, and well worth it. We only spent a couple of days in Milan but it's a city that I would love to return to for further exploration.
This photo is a long exposure taken with my 10 stop filter, which is why the clouds appear to be streaking across the sky. It was about a 2 minute exposure. I love using the 10 stop filter for these sorts of scenes. You get that gorgeous sky and many of the people ghost out of the image. I think it makes for some interesting results. Edited and converted to monochrome in Luminar (or course).