Hey Ken, loved the episode. I also like walking around on grave yards, they combine the best in of three key factors I think:
1) Silence. There are a lot of loud places these days but a graveyard is almost everywhere a place of serenity. 
2) Art. I don't know how things are over there but here a lot of graves are real works of art.
3) History. Even the grave yard of a small little town tells dozens of stories. 

Visiting tips in Europe from a fellow grave yard lover:
- P&egrave;re Lachaise Cemetery in Paris, FR
- Schoonselhof in Antwerp, BE