What man made structures are seen from space?

This ancient fortification, built over many centuries, is the longest man-made structure on Earth, stretching over 6,400 kilometers (4,000 miles). It is visible from space with the naked eye.

* The Great Pyramids of Giza

The three largest pyramids in the Giza pyramid complex, built over 4,500 years ago, are the only structures from the ancient world that are still visible from space with the naked eye.

* The Great Mosque of Mecca

The world's largest mosque and the holiest site of Islam is located in Mecca, Saudi Arabia. The massive courtyard and structure are visible from space.

* Christ the Redeemer

The iconic statue of Jesus Christ overlooking Rio de Janeiro, Brazil, is one of the most recognizable landmarks in the world and can be seen from space.

* The Palm Islands

These man-made artificial archipelagos in Dubai, UAE, consist of three palm tree-shaped islands that are visible from space.

* The International Space Station

The orbiting space station, located about 400 kilometers (250 miles) above Earth, can be seen from space with the naked eye under clear conditions.

* The Hoover Dam

This massive concrete arch dam on the Colorado River in Nevada, USA, can be seen from space and is considered a notable man-made structure.