The Great Pyramids of Egypt, the greenhouses in Spain, the artificial island of Dubai are man-made structures that can be seen from orbit.
The Great Pyramid of Giza has endured the ravages of war, looting, desert winds, and erosion for several millennia.
While there are many conspiracy theories that the Great Pyramid of Giza is the work of aliens, it has a real connection to the universe.
We can totally see them from above. On his final day aboard the ISS, astronaut Terry Virts took this picture of the Great Pyramid as shown in the video. The photo shows that on a day of good visibility, the Great Pyramid can be clearly seen, especially when the Sun is in the right direction and casts a perfect shadow.
The Spanish city of Almería is so arid that it was once a favorite location for filming cowboy movies.
But over the past few decades, hydroponic farming techniques have transformed this place into Europe’s largest greenhouse. Thousands of greenhouses cover the landscape and not only reflect enough light for the astronauts to see them from orbit, but also cool the locality, just as the rest of Spain gets hotter. .
The islands are built largely from sand.
The Palm Islands are a series of man-made islands off the coast of Dubai, created by dredging sand from the Persian Gulf.
What is unique about this archipelago is that the construction requires very little concrete or steel. The archipelago is built largely from sand and while this raises concerns about long-term erosion, it is clearly a much friendlier way to transform the surface of our green planet.