Langkawi Sky Bridge in Pulau Langkawi, Malaysia

Curving wide around a forested mountain peak, the Langkawi Sky Bridge in Malaysia is an impressive feat of engineering, or so it would seem since the bridge has been closed for years with not much chance of reopening. 

Constructed in 2005, the steel skybridge is a pedestrian thoroughfare that allowed visitors to take a scenic stroll high above the lush forests of the Gunung Mat Chinchang mountain. After a tram ride to the foot of the bridge, the walkway winds almost leisurely around the very tips of a trio of mountains. The path is suspended over 2,000 feet above sea level by a single massive pylon that trails thick steel cables down to the bridge. The pieces of the over 400-foot bridge were lifted onto the mountain via helicopter and constructed at elevation. It looks both futuristic and almost frighteningly precarious. And as it turns out, these fears might be justified.

After being open for a scant few years, it closed in 2012 for renovations and repairs. As of 2014, it still has not reopened, and while it is projected to become available again in early 2015, many are not holding their breath.