Some time ago I rented a plot in the outskirts of yellow district, and rather than create a standard shop I decided to emulate a certain kind of attraction common in my neck of the woods: the Free Museum (pulling the name from Marsh's Free Museum, a PNW treasure). Simply put, it is still a store with plenty of things to buy, but it also keeps a variety of curiosities for public viewing. Such things as antiques, preserved animals, and gaffs are crammed between t-shirt racks.
As it stands, I'm fairly proud of my accomplishments in the curio field, being the owner of what I believe to be the only hostile mob in the mall: a fortune-telling husk named Zoltar (all coin-operated fortune tellers are named Zoltar). Recently I've added exhibits showcasing 'The Visible Horse' and the vicious 'Dwarf Ostrich'.
I would like to add more, and so I'm turning to the forums to see what else people want to see. Simple coin-op machines are great, and if you have some manner of curiosity laying around that you'd like to donate I'll add a donors wall.