"Armed with pens and watercolors, urban sketchers from around the world spend three summer days drawing together in the picturesque Portuguese capital by the Tagus river. Field sketching workshops led by local and international instructors, lectures and exhibits offer a unique opportunity to develop your drawing skills and meet the faces behind the online avatars." — symposium.urbansketchers.org
Events like these are a fantastic opportunity to explore the area and take a look at "nearby photos". To see them, find a geo-tagged photo, then click on the map on right of the photo page. A new overlay with a bigger map will open and right below the plan you find a link the see nearby photos and videos:
You can meet the artists and discover the multitude of drawing styles and techniques in the symposium’s group pool, but also in many other groups here on Flickr.
Photos from petescully, tiastudio, marin71, and gerard michel.