I’ve stumbled across this rather nifty site: Forgotten Bookmarks. It’s pretty self-explanatory. The owner works at a used bookstore and finds all kinds of crazy stuff in the books they purchase. I particularly like “Scandalous!” about half-way down the front page, hehe.
Weirdest bookmark I ever found: someone had used the miniaturized Oxford English Dictionary I bought at Recycled Books to press a rose, then left it in there.
Anyway, great sites like this can be perfect for busting up writer’s block or crafting some fun “found object” writing prompts. Enjoy!