Seattle actually has a directory of historically and agriculturally important trees, they call the Heritage Tree Program: http://www.seattle.gov/transportation/projects-and-programs/programs/trees-and-landscaping-program/heritage-tree-program And, because Seattle is good with data, they also make the location of all these trees available in a useful form: http://www.seattle.gov/transportation/projects-and-programs/programs/trees-and-landscaping-program/seattle-tree-inventory-map And I took a subset of that data and put it into Tableau so people could see where the cool Heritage Trees are located (note, this is not my visualization, because I don't want to link my actual name to my Hubski name)" https://public.tableau.com/profile/amanda.pype#!/vizhome/HeritageTreesinSeattle/HeritageTreesinSeattle So trees are a kinda cool think to dig into, in cities.