I developed a plugin to display routes and locations on a customizable map.
Easily add geographical tags on a map when you write a post, and it will automatically create new countries and localities terms. You can also order those locations randomly or by date to define your routes.
Use the map as a widget, and pick your own colors to customize it.
It is a SVG map that react to users actions (mouse over posts and terms links, click on route line…).
Use the comments here if you have any questions.