The Seven Wonders of the world were first designated by Antipater of Sidon in the second century AD. Not all classical writers list the same items as the  Seven Wonders of the world but most of them agree on the following:

The Pyramids of Egypt 

Are a group of three pyramids, Khufu, Khafra and Menkaura at Giza (near Cairo) to a southern limit 96 km distant are often called the first wonder of the world. The oldest of those is that of Zoser, at Saggara, built by about 2700 BC. The great pyramid of Cheops covers more than

Hanging Gardens of Babylon 

Adjoining Nebuchadnezzar's palace, 96 km. south of Baghdad, the gardens were built in the 6th century BC. Terrace gardens ranging from 23 to 91 meters (75 to 300 Ft.) at the ground level, watered from storage tank on the highest terrace.

The Tomb of Mausolus

At Halicacamassus, in Asia Minor. Built by the widowed queen Artemisia about 350 BC.

The Temple of Diana at Ephesus

Ionic temple erected about 350 BC in honor of a non-Hellenic goddess who later became identified with Greek goddess of the same name. The temple with ionic columns 18 meters high, was destroyed during an earthquake in 224 BC.

The Colossus of Rhodes  

A bronze statue of Apollo, set up about 280 BC. According to legend it stood at the harbour entrance of sea port of Rhodes. It was destroyed during an earthquake in 224 BC.

The Statue of Jupiter Olympus 

At Olympia in the plain of Ellis constructed of Marble inlaid with ivory and gold by the sculptor Phidias, about 430 BC. All trace of it has been lost, except for reproduction on coins.

The Pharos of Alexandria

A marble watch tower and lighthouse on the island of Pharos on the harbor of Alexandria, built by Sostratus of Cnidus during the 3rd century BC. It was destroyed by an earthquake in the 13th century.

More...