10 walking tour ideas
Places where authors lived and/or places mentioned in books, etc.
Comedy clubs, scenes from funny movies etc.
3. Funny walking tours
4. Dark walking tour
Deaths, sites of tragedies etc
5. Related to fun/funny events
6. Sites related to intellectuals
Philosophers, writers and whatnot. Where they lived, worked, socialized, etc.
7. Related to a foreign culture
Russian culture tour of Brooklyn, Jewish culture tour of Paris, Persian tour of LA, etc.
8. Politically oriented tour
Conservative tour (where conservative icons lived, sites of politically conservative events, etc.) or the equivalent for left-wing or liberal politics.
10. Mix it up with a game
Some sort of quest, a treasure hunt, or something. Maybe each participant ends up in different places depending on the clues they find.