Landscape Arch, Utah

This natural bridge is located in the Devils Garden section of Arches National Park and is very old and almost near the end of its lifecycle.

In its thinnest area, the arch is only 6ft thick, yet it supports a span of rock that’s 290ft long. It is safe to say that the arch could collapse at any time.

Of course, only time will tell whether this means tomorrow or within the following centuries. In 1991, a 73ft slab of rock fell out from under the thinnest section of the span.

However, the stone that fell was probably not structurally crucial to the arch. In fact, by reducing the weight of the suspended rock, the arch was perhaps strengthened.

In 1995, another 47ft mass of rock fell again, followed by another 30ft rockfall the same year.

Because of this, the Park Service has closed the loop trail that once led underneath the stunning natural bridge.