For someone who has trouble turning their brain off, even while on vacation, these free printable models of architectural landmarks from Canon seem like they'd make for a somewhat maddening way to spend a few — or possibly a lot of — hours folding and gluing, with results that look about a thousand times cooler than the aftermath of a comparable amount of jigsaw puzzle-ing.

The finished models look extremely detailed and vary in complexity, but most of them seem like they involve a LOT of small pieces of paper to cut out and assemble, so be ready to sign away a few hours of your life. Canon also offers a selection of paper crafts from cut and fold animals to vehicles to a variety of toys and puzzles.

• Visit Canon's Creative Park website to see and download them.
• Check out this post on Ohdeedoh for more free downloadable paper crafts from Yamaha.

Images: Canon