The Statue of Zeus

In about 450 B.C., the city of Olympia -- where the first Olympic Games were held in 776 B.C. -- built a temple to honor the god Zeus.

Many considered the Doric-style temple too simple, so a lavish 40-foot statue of Zeus was commissioned for inside. Athenian sculptor Phidias created an ivory Zeus seated on a throne, draped in a gold robe. Zeus had a wreath around his head and held a figure of his messenger Nike in his right hand, and a scepter in his left.

Eventually, wealthy Greeks decided to move the statue to a palace in Constantinople (present-day Istanbul, Turkey). Their effort prolonged its life, as fire later devastated the Olympia temple. However, the new location couldn't keep Zeus eternally safe: a severe fire destroyed the statue in 462 A.D.

All that remains in Olympia are the temple's fallen columns and the foundation of the building.

Location: Ancient Greek city of Olympia

The Hanging Gardens of Babylon

These gardens -- which may be only a fable -- are said to have been laid out on a brick terrace by King Nebuchadnezzar II for one of his wives. According to the writings of a Babylonian priest, they were approximately 400 feet square and 75 feet above the ground. His account says slaves working in shifts turned screws to lift water from the nearby Euphrates River to irrigate the trees, shrubs and flowers.

Location: In Babylon near modern-day Baghdad, Iraq