We all know the party only gets started when the pizza arrives. But I think the people over at Disco Volante (translation: flying disc) pizzeria in Vienna took it too literally when we meant we want a party in our tummy. Designed by Austrian architect Lukas Galehr, this seemingly out-of-place disco ball is actually a fully-functional pizza oven. And it even rotates! At night, they dim the lights and focus different colored lights on it. The green, pink, and blue lights bounce off the disco ball and reflect onto the clean, white interiors.