У вашего броузера проблема в совместимости с HTML5
Descending the "roots"-trail from Fraekmuentegg to the Lake Lucerne.
Pilatus Mountain:
https://en.wikipedia.org/wiki/Pilatus_(mountain)
GPS:
https://www.gaiagps.com/datasummary/route/7cf2298d-8cd1-4710-90eb-c160927d0a36/?layer=GaiaTopoRasterMeters