Visiting new places typically means seeing things that come as a bit of a surprise. When I first saw the Cologne Cathedral I was surprised by the sheer amount of scaffolding all around the cathedral for the ongoing restorative work. The restorative work is necessary to preserve the building, as construction began 770 years ago!!!
Then, Hohenzollern Bridge surprised me by having a third arch (barely visible on the right side of the photo above)! The photos I saw before my visit were framed showing only two arches.
Fun fact: The Cologne Cathedral is currently the tallest twin-spired church in the world at 516 feet tall. It was the tallest building in the world between 1880 and 1884.