A short walk from Plaza Mayor, there is a small, elbow-shaped street conveniently named Elbow Street (Calle Codo). There's no unusual draw to this street. You won't find many people walking down it, especially not tourists, unless they know about the nuns. Yes, nuns. And these nuns can bake.

El Convento de Corpus Christi is a convent of cloistered nuns on Elbow Street Calle Codo in Madrid. The Hieronimus nuns have no contact with the outside world and make their money by selling traditional Spanish sweets. The variety of cookies are sold by using a wooden turntable where you choose your box and replace it with the money owed.

Take a look at the video to better understand this unique experience..