The Heidelberg Youth Hostel is one of the nicest hostels I have stayed in so far.
Just a great colorful weekly market.
http://www.diebergstrasse.de/index.php?id=112&L=2
http://www.expatica.com/de/entertainment/ent_leisure/when-in-heidelberg-head-for-the-hills-31368.html
Yes, hell is right here.