A nice two and a half minute news video on a Dane who has decided to reach every country in the world without using flights :
https://www.aljazeera.com/news/2018/07/man-mission-travel-country-planes-180731110316230.html
https://www.aljazeera.com/news/2018/07/man-mission-travel-country-planes-180731110316230.html