If you have ever been to a CiCi's Pizza they have all these weird pizzas they are always trying out. It's a buffet so you can try some of all of it. A couple highlights:
Macaroni and Cheese Pizza
Baked Potato Pizza
I have gotten a ton of crazy pizza over the years but it's late and I can't remember too many. It's not a weird topping, but if anyone lives near a Pizza Hut, they introduced this new pizza that has little dough cups in the crust filled with cheese. They use smoky provolone in the cups and it is incredibly good. Best new thing they have come up with in years.