This visualization shows the new way of exploring metro data. The Metropolitain.io map presents Paris metro network through 2D and 3D visualization. You can also explore data through time view and crowd view, get statistical data about metro stations, etc. I especially like the function in the time view, where you can select metro station and all the network transforms depending on the time spending to get to the rest of metro stations. So take a look and write you thought in the comment section bellow. Here you can find more information about this map.
I think that 3D mania in GIS sometimes has no sense, its only look nice, but this map shows, how using 3D visualization we can get additional information and look at the geographic data from different perspective of view.