Considering the Schnookeloch in Heidelberg?
A VT member wrote the following comment about visiting Heidelberg:
Old Town Information by tini58de
There is a very helpful website with loads of information on the sights in the old town of Heidelberg:
Old Town Information
At the Tourist Information just outside the Hauptbahnhof/Main Station you can usually get this information as a little pamphlet - so check that out as well!