Extreme outdoor activities on the First Mountain are some of the best things you can do in Switzerland like reenacting Mario Kart on a real Moo Moo Farm race track.
Paragliding, 88km/h by zipline, mountain carting and scooter biking, the First mountain in Grindelwald offers it all. I recommend taking the gondola from Grindelwald in the early morning to the top of the mountain on which you can enjoy breathtaking views of the valley than enjoy the famous cliff walk with glass floor before heading to the zipline.
The lineup at the zipline can easily grow to a 2 hour wait so I highly suggest you make that your first activity in the morning after the cliff walk. Afterwards hop on the mountain cart located next to the zipline end-station to experience Mario Kart in real life.
The prices vary a lot per activity with paragliding at $200, zipline at $30 and mountain cart & scooter bike both at $20 each. Whatever your budget, a day on the First is worth every penny especially when the skies are clear and the weather is warm.
If you are not on a tight budget, treat yourself to a delicious lunch at the First restaurant and enjoy its great views from the terrace. If you are on a budget, I highly recommend you pack a lunch to safe cash for the activities.
Finally, the scooter bike, these bikes go extremely fast so don't be generous on the breaks while in tight situations. The scooter bike trails take your through gorgeous landscapes with grazing cows and little mountain cottages, ideal Instagram-selfie-opportunities here.
If time permits hike towards the lakes on the First, at the Bachsee and Hagelseewli you will be able to enjoy astonishing views.
As a bonus tip, you can purchase a First mountain package that includes multiple activities for a low price, visit Jungfrau's website for more information.