For xxxholic, I would think a place like a Japanese garden would be appropriate. Otherwise, take cues from what outfits your characters are wearing. For instance, Yuuko's Victorian costumes would look appropriate in a rose garden or a Victorian-style house.
P.S. If you're going to shoot in a cemetary, check the rules about photography.
Cosplay photographs of myself and others, as well as excursions in general photography, propmaking and would-be epicureanism: victoryofjoy.deviantart.com