Have you seen that guy dressed like Darth Vader, riding a unicycle, and playing flaming bagpipes?
In case you don't see him during your visit, here are a few other curiosities you might want to investigate:
The Pecularium is a museum with hands-on activities and many weird, weird items, such as bugs (on your sundae, no less), Bigfoot, and silly hats.
Get a tour of the Shanghai Tunnels. No relation to the actual city of Shanghai, these tunnels were so named because they were used by shady folk who kidnapped men and sold them into slavery on ships.
Be on the lookout for tiny horses.