<human>: Provide a brief overview of the text.

Hey reddit! I am going on an adventure to Europe in about a month. I have dual American/German citizenship, but I haven't been out of the US in about 15 years. I plan on visiting London, Oxford, Berlin, Prague, and ending my trip near Ulm with my family there. My query is about the stranger, more funky alternatives to the main tourist attractions in said cities. I'm looking to really get off the beaten path and get a feel for the interesting cultural chunks of these meaty places. 
I'll have between four and seven days in each place. I'm a student, so cheaper would be better, but its not a required limitation.
<bot>: what is the best, funkiest, most alternative stuff to do in London, Oxford, Berlin, Prague, and Ulm?