a german skywalks, so to speak. we caught up with a few people who made the trip and asked them if it was worth it. >> a mountaintop holiday, perhaps the ideal vacation for vacation lovers for fans of extreme sports but attracting a wider group is tougher. >> over the years, we have tried. when i look at the number of gas in 2007, it was pretty low. we were left with the choice of closing everything down or offering something new. we did not want to shut down, so we had to find something new. >> they came up with an unusual attraction, a 60 ton steel structure. >> we open on the fourth of july this year. since then, the number of visitors has doubled and the numbers are up across the region. the response has been more than good. >> visitors stand on a platform about 1,0 from the floor. they are separated from the press office by an iron grating. >> it is fantastic, especially when you go across the floor with all of those holes in it. then you get a feel for how far this. >> my hands are sweaty and i and shaking, bu