Budapest Telephone Museum

If you find yourself in Budapest’s Castle District, keep an eye out for a discreet brass sign next to the grand green doorway of a somewhat dilapidated building.  

Walking through the door, a guard might be there to give you directions. If not, continue straight through the building into a courtyard, then turn left and go straight through the next building into another courtyard. Turn right, and continue until you see a collection of telephone paraphernalia presumably too big to fit in the museum. Ring the bell.