good ol' days
Copenhagen's Archive and the Museum of Copenhagen have launched a new website, where you can search and browse pictures from more than 100 years (before I joined ello): kbhbilleder.dk
It's both a portrait of the city's history as well as of the development of photography. @bjarnewitthoff
Not connected to this website, but also old and beautiful: The pictures below show Kastrup Værk - a typical example for industrial buildings from the 18th century.