If you’re a Lord of the Rings fan and have access to a 3D printer there’s a lot of stuff you could make. But how about some of these Gates of Argonath gates? If you’ve seen the films, which of course you have (right?), you’ll recognise the giant statues of long dead kings that feature in the film.
While it probably wouldn’t use that much material to print smaller versions as bookends the supersized versions could be both tricky to print, as well as a bit on the expensive side. Or if you’re lazy you could buy bookends already made up by somebody else. Personally I’d be tempted to get the bigger versions if they were readily available, though they aren’t at the moment as far as I know.
If you want to try there’s 3D printing files available from a number of places including here.