I found this visualisation cool too, I can imagine a "roadtrip travelogue" that scrolls the images, and in the background the route / landmarks are highlighted on the map.

Looks like the clicks are handled here:

https://github.com/chicagomaroon/data-visualizations/blob/52...

The rest of the repo seems to contain all the data and JavaScript, including GeoJSON files, which GitHub even renders on a map.