It's a terrifying job, but someone's got to do it. A handful of brave men are tasked with the job of cleaning the Grand Canyon's Skywalk tourist attraction - and are often left dangling over 4,000ft high.
One man can be seen swinging on ropes as he attempts to get the underside spic and span in a move that would churn most stomachs.
The Grand Canyon Skywalk is a transparent horseshoe-shaped cantilever bridge and tourist attraction in Arizona near the Colorado River on the edge of a side canyon in the Grand Canyon West area of the main canyon.
Topographic maps show the elevation at the Skywalk's location as 4,770ft and the elevation of the Colorado River in the base of the canyon as 1,160ft, and they show that the height of the precisely vertical drop directly under the skywalk is between 500ft and 800ft.
Yep, we definitely wouldn't take on that cleaning role.
Commissioned and owned by the Hualapai Indian tribe, it was unveiled on 20 March, 2007, and opened to the general public on 28 March, 2007.
It is accessed via the Grand Canyon West Airport terminal or a 120-mile drive from Las Vegas, which includes a 10-mile stretch of dirt road that is currently under development.
The Skywalk is east of Meadview and north of Peach Springs with Kingman being the closest city of some size.
The Grand Canyon is a steep-sided canyon carved by the Colorado River in the US in the state of Arizona.
It is contained within and managed by the Grand Canyon National Park, the Hualapai Tribal Nation, and the Havasupai Tribe.
The Grand Canyon is 277 miles long, up to 18 miles wide and has a depth of over a mile (6,000 feet).