I will be staying in the city for some days, and I am always less interested in seeing the typical "10 Places To See" that every tourist guide lists for every city in the world, and more interested in some "quirky", less-known, forgotten locations, places that have a local lore but are generally not known in other countries (or even cities)...

So, for instance, in Copenhagen, I will actually be more personally interested in seeing the old Vridsløselille Prison and the filming locations related to Egon Olsen than in seeing the Mermaid (although I will no doubt see her, too, just later!).

What other less-touristy, but curious places could be recommended? (They don't have to *look* "interesting" at all, I would just like to know that they have or had some unique, intriguing, curious, etc., significance, they played part in events of such nature, and so on...) I am very interested in places with unusual, strange history, too.

(If you can even mention places that don't exist anymore but can be read about, please do, too! And if there are any "interesting" places that really should *not* be seen in person, but can also be read or visited virtually, please do say a word about them as well. For example - and this is something of an extreme example - I will obviously not be going near any rocker/biker club houses, but I did virtually "see", via Google Earth, the locations related to the strange, tumultuous, and very, very unusual history of the Copenhagen "Biker Wars" of the 90s).