What is the only man made structure visable from space?

Answer 1

The three gorges damn on the yangsi river in china is visible from space.

In Canada, I believe the Winnipeg floodway, a 30 mile diversion built around the city of Winnipeg to prevent flooding from the Red River, is viewable from space.

The Great Wall Of China is NOT visible from space. If you thought about it just for a second you would realise that because something is long it doesnt make it visible. the fact that it is only as wide as a large wall means it is nowhere near visible. If it was then all walls would be visible from space and there are billions of things bigger than walls.

The light on top of the Luxor hotel in Las Vegas, Nevada can also be seen from space

The Sedan Crater is a man-made object that can be seen from earth orbit with the unaided eye.

Answer 2

The Great Wall of China is often cited as the only man-made structure visible from space with the naked eye. However, this claim is a myth as many other large structures like cities and highways are also visible.

Answer 3

There is a longstanding myth that the Great Wall of China is the only manmade object visible from space. It and several variations on the theme are great fodder for water cooler arguments. In reality, the Great Wall of China cannot be identified from "Space" or about 400 kilometers up (confirmed by the International Space Station). However, many human constructs can be seen from Earth orbit.
Shuttle astronauts can see highways, airports, dams and even large vehicles from an Earth orbit that is about 135 miles (217 kilometers) high. Cities are clearly distinct from surrounding countryside, and that's true even from the higher perch of the International Space Station, which circles the planet at about 250 miles (400 kilometers) up.
"You can see an awful lot from space," says astronaut Ed Lu, the science officer of Expedition Seven aboard the station. "You can see the pyramids from space, especially with a pair of binoculars. They are a little difficult to pick out with just your eyes."
Egyptian pyramids have been photographed from space several times with standard digital cameras and high-powered lenses. The largest pyramid at Giza, on the outskirts of Cairo, is 745 feet (227 meters) wide and 449 feet (137 meters) tall.
"With binoculars you can see an awful lot of things," Lu wrote via e-mail in fielding a question from an Earthbound space fan. "You can see roads. You can see harbors. You can even see ships; very large tankers on the ocean we can see using the binoculars."
There are some surprises, too.
"You can see airplane contrails, and occasionally at the end of an airplane contrail, you will see a glint of sunlight off the airplane," Lu says. "And very occasionally, you do see other satellites go by. It is kind of a neat thing to see."
There are of course places in space from which you can't notice how humans have sculpted the planet. Apollo astronauts could not make out manmade features from the Moon, for example. And from Mars, Earth would appear to the naked eye as nothing but a bright "star" in the night sky...
This question is not very specific, which makes it hard to describe as what is "visible" from "space". How far up is "space"? Since space generally is believed to be past/the end of the exosphere of Earth (400-550 kilometers), we can conclude that without a zoom lens, nothing but the bright lights of cities can be seen from space.

Answer 4

The Great Wall of China