Postcards are one of my favorite hobbies. I love everything about them – receiving postcards in the mail, looking at the stamps and postmarks, and the process of buying, signing and sending postcards to others or myself.

I now have about 100 postcards in my collection from all over the world. Basically they can be divided into two categories:

• Postcards I received by participating in postcrossing (a project to exchange postcards with random people from around the world).
• Postcards that I send myself from my own travels to refresh my memories when I arrive. And in general, it’s another option of what you can bring back from your vacation.

And so this summer, while I was traveling in Prague, I received one of the most unusual postcards in my mailbox that not only I have, but postcrossers in general. At least, I couldn’t find a single mention of it on the Internet (although, of course, I think a few hundred other people on the planet have them).