I don't know much about Europe. I've attempted to learn German, Swedish, French and Spanish. The hard part about learning languages is if you don't have any use for them then you forget the words.
A lot of what I do know about these cities and countries I find from Wikipedia as well as news events. My particular interest in Germanic Europe stems from news stories I've read, in the past, concerning countries such as: Germany, Sweden, or Finland. These countries are home to some of the smartest people in the world and what comes from them is quite incredible.
Unfortunately, Google Maps doesn't let you add many destinations nor does it let you add any additional destinations when using public transportation.
There's also a ferry from Sweden to Finland that Google Maps doesn't seem to know about.