The seven wonders of the ancient world

The Seven Wonders of the Ancient World, and all sorts of mysteries attaching to them, have intrigued people since the second century BCE. Why were these particular creations chosen and when? And why did the ancients want to draw up such a list in the first place? What were the technical and cultural factors involved in the creation and listing of the Wonders?
The Seven Wonders still rival many of the phenomenal products of both nature and mankind in their size, majesty, and beauty. Six of them no longer stand, having been destroyed by natural disaster or by human intervention.
From the Pyramids at Giza to the Colossus of Rhodes, from the Hanging Gardens of Babylon to the Lighthouse of Alexandria, from the Temple of Ephesus to the Mausoleum at Halicarnassus and the Statue of Zeus at Olympia, the Seven Wonders of the Ancient World have never ceased to fascinate down the ages.