I've been browsing the sketchbook challenge flickr group and there are some terrific sketches for the theme Shelter being added to the group over there. Here's just a few of the most recent ones that have been posted:
Note: please click on the photo to go to the original photo posted on flickr where you can leave a comment for the creator.
by Julie-Anne McD:
by Chris Aiton:
Check out all the wonderful images in the sketchbook challenge flickr group here!