The major rivers of the Columbia watershed, rendered in the style of urban transit maps. Perfect for the urbanite who cannot understand nature without it being put into more hip, more modern terms. 10% of profits from the sale of this poster will be donated to groups that protect and restore streams in the watersheds seen in this river map series.
For more information on how this map was constructed, check out my blog post about the subject here. For detail images of this map and others in the series, look here. To find out when new products appear in the store, follow me on Twitter as @somemaps.