In my time on the road, I've collected multiple shelf-loads of souvenirs: lacquered alligator heads, Thing shot glasses, meteorites, jugs of healing thermal water ... and lots and lots of postcards and magnets.
I've never, however, considered them photographic subject matter. Not when I've got the attractions themselves to shoot.
Photographer Michael Hughes knew better than me. Since 1999, he's been working on a series of images that not only record his worldwide travel memorabilia, but with said memorabilia substituting the monuments they depict.
Check out his Flickr set to see how the concept is more interesting than it sounds.