One thing that I always found creepy has to be the way memorials and stones erode over time. Some of them aren't that bad. Then there are those that look like they can belong in a horror film.
This child's tombstone is just plain creepy. It's the face that makes me cringe a little on the inside. You can see where the eyes were. The nose looks like it is missing. It looks like there is even a vein in the neck.