In Orange, Connecticut, just outside of New Haven, is a kind of mecca for Pez fans: the Pez Visitor Center. It has a small museum, shop, and some nice displays. It's also the site of a Pez factory, but that isn't open to visitors.
Pez seems synonymous with American candy, but it was actually invented in Austria in 1927. A few decades later, they started selling candy with the now iconic dispensers. There are a huge number out there, not to mention a faithful following of collectors.
Here's a look at one of the displays at the Pez Center, showing Superhero and Monster dispensers from over the years.