Hanging Gardens of Babylon

The Hanging Gardens of Babylon (also known as the Hanging Gardens of Semiramis) (near present-day Al Hillah in Iraq, formerly Babylon) are considered one of the original Seven Wonders of the World. They were built by Nebuchadnezzar II around 600 BC. He is reported to have constructed the gardens to please his wife, Amytis of Media, who longed for the trees and fragrant plants of her homeland.The gardens were destroyed by several earthquakes after the 2nd century BC.

The lush Hanging Gardens are extensively documented by Greek historians such as Strabo and Diodorus Siculus. Through the ages, the location may have been confused with gardens that existed at Nineveh, since tablets from there clearly show gardens. Writings on these tablets describe the possible use of something similar to an Archimedes' screw as a process of raising the water to the required height.

The Greek Historian Strabo:
"Babylon, too, lies in a plain; and the circuit of its wall is three hundred and eighty-five stadia. The thickness of its wall is thirty-two feet; the height thereof between the towers is fifty cubits; that of the towers is sixty cubits; and the passage on top of the wall is such that four-horse chariots can easily pass one another; and it is on this account that this and the hanging garden are called one of the Seven Wonders of the World. The garden is quadrangular in shape, and each side is four plethra in length. It consists of arched vaults, which are situated, one after another, on checkered, cube-like foundations. The checkered foundations, which are hollowed out, are covered so deep with earth that they admit of the largest of trees, having been constructed of baked brick and asphalt — the foundations themselves and the vaults and the arches. The ascent to the uppermost terrace-roofs is made by a stairway; and alongside these stairs there were screws, through which the water was continually conducted up into the garden from the Euphrates by those appointed for this purpose. For the river, a stadium in width, flows through the middle of the city; and the garden is on the bank of the river."

The Greek Historian Diodorus:
"The Garden was 100 feet (30 m) long by 100 feet (30 m) feet wide and built up in tiers so that it resembled a theatre. Vaults had been constructed under the ascending terraces which carried the entire weight of the planted garden; the uppermost vault, which was seventy-five feet high, was the highest part of the garden, which, at this point, was on the same level as the city walls. The roofs of the vaults which supported the garden were constructed of stone beams some sixteen feet long, and over these were laid first a layer of reeds set in thick tar, then two courses of baked brick bonded by cement, and finally a covering of lead to prevent the moisture in the soil penetrating the roof. On top of this roof enough topsoil was heaped to allow the biggest trees to take root. The earth was leveled off and thickly planted with every kind of tree. And since the galleries projected one beyond the other, where they were sunlit, they contained conduits for the water which was raised by pumps in great abundance from the river, though no one outside could see it being done.

"And then there were the Hanging Gardens. Paracleisos going up to the top is like climbing a mountain. Each terrace rises up from the last like the syrinx, the pipes of pan, which are made of several tubes of unequal length. This gives the appearance of a theater. It was flanked by perfectly constructed walls twenty-six feet thick. The galleries were roofed with stone balconies. Above these there was the first of a bed of reeds with a great quantity of bitumen, then a double layer of baked bricks set in gypsum, then over that a covering of lead so that moisture from the soil heaped above it would not seep through. The earth was deep enough to contain the roots of the many varieties of trees which fascinated the beholder with their great size and their beauty. There was also a passage which had pipes leading up to the highest level and machinery for raising water through which great quantities of water were drawn from the river, with none of the process being visible from the outside

Great Pyramid of Giza

The Great Pyramid of Giza, also called Khufu's Pyramid or the Pyramid of Khufu, and Pyramid of Cheops, is the oldest and largest of the three pyramids in the Giza Necropolis bordering what is now Cairo, Egypt, and is the only remaining member of the Seven Wonders of the Ancient World. It is believed the pyramid was built as a tomb for Fourth dynasty Egyptian pharaoh Khufu (Cheops in Greek) and constructed over a 20 year period concluding around 2560 BC. The Great Pyramid was the tallest man-made structure in the world for over 3,800 years. Visibly all that remains is the underlying step-pyramid core structure seen today. Many of the casing stones that once covered the structure can still be seen around the base of the Great Pyramid. There have been varying scientific and alternative theories regarding the Great Pyramid's construction techniques. Most accepted construction theories are based on the idea that it was built by moving huge stones from a quarry and dragging and lifting them into place.

There are three known chambers inside the Great Pyramid. The lowest chamber is cut into the bedrock upon which the pyramid was built and was unfinished. The so-called Queen's Chamber and King's Chamber are higher up within the pyramid structure. The Great Pyramid of Giza is the main part of a complex setting of buildings that included two mortuary temples in honor of Khufu (one close to the pyramid and one near the Nile), three smaller pyramids for Khufu's wives, an even smaller "satellite" pyramid, a raised causeway connecting the two temples, and small mastaba tombs surrounding the pyramid for nobles.