Do you have a big collection of LEGO minifigs? You could leave them hanging out on a shelf where they can easily be knocked over, or you could display them on one of these shelves designed specifically to keep their feet from sliding around.
The Minifigure Mantle provides a handsome wall-mountable shelf which is just deep enough to display minifigures, and has built-in LEGO studs to keep them neatly in line. Keyhole mounts on back make them easy to hang flush to your wall too, and hanging hardware is included.
If you have a couple hundred minifigs, it would look pretty awesome to cover the entire height of a wall with these shelves.
The display shelves range in price from $29.99 to $69.99 depending on materials and length, and are available in lengths from 23.25″ (19 minifigs) to 47.25″ (38 minifigs), and materials like pine, walnut, and baltic birch. They can also be ordered in custom lengths. Check out the full selection over on the Minifigure Mantle Etsy shop.