We went to Jungfraujoch - and there was one of two REALLY cool trains. They have a grooved center rail and (I guess) a wheel or wheels that engage as you run. There is an observation structure at the top - the rail was created for a physics center located on this mountain. It snowed there overnight and was pretty cold. They have several outdoor platforms you can get to.......The train goes through a pretty long tunnel through the mountain to get there - and you have to walk through one to get to the observation point. The altitude didn't bother me much - but claustrophobia got me in the one tunnel we had to walk. We were at the highest point in Europe up there - above a lot of the mountain range - and above the clouds, too. It was breathtaking!!!
Today's adventure completed, we are back in the condo and we can actually see where we were from our balcony. Waaaaaay cool!