Connected Landlocked Countries of Europe

This is roughly a 20-hour long road trip through the connected and landlocked countries of Europe. I set out to find out the shortest trip between the highest number of landlocked countries you could drive through on Earth, as I noticed that many land locked countries are near each other. I wanted to avoid driving through more than one country once or going into non-landlocked countries. Then I realized during my research that Europe and Africa both have the same number of countries you can drive through continuously. Although more exist in Africa, there isn't a real road between Niger and Chad, so that ties them up. So I decided to do Europe's first, and then I will tackle Africa, where I still might make the trip travel across the aforementioned border, as it is drivable.

Included below are resources to view the trip in Google Maps and Google Earth.  

Here is the trip on Google Maps: https://www.google.com/maps/dir/47.2103981,9.4972053/47.3913897,13.056168/48.1707114,15.1769493/48.7041184,16.9873429/48.0317936,17.1428066/46.1522973,19.9360318/43.224887,20.6994066/42.134595,21.3081562/@46.2967151,11.2651417,686127m/data=!3m1!1e3!4m2!4m1!3e0?entry=ttu

I also found this one on Google Maps, which is slightly faster, but is longer: https://www.google.com/maps/dir/47.2103981,9.4972053/47.3913897,13.056168/48.1707114,15.1769493/48.7041184,16.9873429/48.0317936,17.1428066/46.1522973,19.9360318/42.9369147,21.2437606/42.134595,21.3081562/@43.5892553,19.3174166,733130m/data=!3m1!1e3!4m2!4m1!3e0?entry=ttu

Here is the trip on Google Earth:  https://drive.google.com/drive/folders/1Q4RN3NuEKsbxwyMbq7OCsm30R7EJcQzh?usp=sharing

Special thanks to https://www.gpsvisualizer.com, as their tools are what makes creating the Google Earth files possible.