March 11 attacks memorial at Atocha train station.
"I'm an an architect and also a Theology student in Madrid. Drawing is my passion. When I walk around the city I carry my sketchbook to document every moment and place in the city. I like to observe the different cultures and people while I ride the metro. I take advantage of waiting times to draw the movement in the urban environment. It's like taking photographs but drawing instead of using a camera."
• Nuno's blog: Caderno de viagens.