Creative 3D Popup postcards Featuring Famous Monuments in Italy

I am a big fan of collecting postcard around the world. Any places I go, I always try to find some typical postcard which features the famous building or beautiful scenery of the place. But sadly, most of them are just a photo at one side and text area at the other. Today, I came cross this 3D popup postcard online, which features famous monuments in Italy. I am not sure how much effort needed to have postcard printing like this, but they are definitely elegant and special. It is also said they can be mailed without the envelope because of their innovative closure device. Take a look at those Creative 3D Popup postcards. Don’t you think they can be a perfect collection. [source]