... multilevel system of vaults made of concrete. It was used for staged battles between lions and Christians, among other spectacles, and is one of the most famous pieces of architecture in the ... restored, mainly for purposes of tourism.The Great Wall Located on the west bank of the Nile River on the outskirts of Cairo, the pyramids at Giza, Egypt, rank as some of the best-known monuments ... Technically, the gardens did not hang, but grew on the roofs and terraces of the royal palace in Babylon. the Hanging Gardens of Babylon The Mausoleum of Halicarnassus, depicted in this hand-colored...