This first drawing was made in Plaza Mayor in Madrid, please click on images to see the full size. (And sorry for the poor quality of the images, I don't have a scanner so I'm taking photos of drawings as I go)
And this second drawing was done on a little street near Plaza de Zocodover in Toledo.
And now for the street art...
Here is "Switch," a pair of copper etchings by Karat that represent the front and back of a single postcard. It's in the Lavapies neighborhood of Madid, on Called de Jesus y Maria at Calle de la Esgrima.