Every Monday I will show off my collection of maps that I have been collecting over the years these range from some the oldest maps with some great history connected to them. To the cheapest throwaway maps that are given out in every major city in the world. I don't believe in keeping it in perfect condition so still have marks on them too which you can extract a story from just like your own treasure map.
This map shows the amount of the underground rivers and tributaries within the Dublin City area. The two colour really shows the complexity within the waterways of Dublin city centre without making the main message easily communicated to the user of the map.