the time lapse footage captures the train descending the 9 km long track .
video opens in tunnel built into swiss mountain before train heads outside .
train passes skiers before picking up speed and reaching the station .
the track runs from kleine scheidegg -lrb- 2061m -rrb- to jungraujoch -lrb- 3454m -rrb- .
opened in 1912 , the track is visited by more than 800,000 people per year .