Not for want of someone discovering it while you're over there. It's possible, and a good guidebook will tell you where. Other travelers may tell you what delighted them , but they can't know what will delight you. Do be aware that all books have prejudices as well, but the best are comprehensive. If you read a couple you can draw your own conclusions about what you want to see.
More people spend more time checking out hotels than sights and suggested walks.
For us, at least, the reason we visit a city is to see the sights, not stay in a hotel. Having prepared, be flexible. More than what to see, you'll learn how to travel. No one should make their first trip to Europe without having read it. Europe 101 provides, in enjoyably irreverent fashion, the background and context of Europe so you can appreciate what you're seeing.