Giant Marble Run

Where balls make children's hearts beat faster

What looks like pure fun is actually packed with technology and attention to detail: The marble run by artist Stefan Grünenfelder, made possible by the Roger Federer Foundation, features 14 ingenious mechanisms that keep the marbles spinning, pulling, climbing, and dancing—even in winter. They roll 145 meters through the adventure, with no beginning and no end. And best of all: Admission is free.

And who says it’s just balls that start rolling? At Pradaschier Adventure Mountain, it’s often children’s hearts as well—full of joy, curiosity, and play. Just stop by, give it a try, and roll home with a smile.