Mountain Trail in Spain
The entrances for this trail are closed but not policed. It was built in the 1920's for hydro workers. There is no rail but there is a chain to hold onto but it doesn't hold much weight and several people have fallen to their deaths. This is an amazing walk! This should have you on the edge of your seat possibly feeling slightly dizzy. It's 6 minutes long and should be watched till the very end.
To intensify the experience, click on the full screen button ...It's enough to make you nauseous especially when you consider that it was filmed by someone who made the hike carrying a video camera while he did it.