7. The Pharos at Alexandria
The site of a lighthouse built (334 BC) under orders of Alexander, who united the island of Pharos with a land bridge, forming a peninsula, upon which the lighthouse was erected. In 280 BC, the lighthouse which would become a Seven Wonder was erected by Ptolemy II. Variously estimated to be anywhere from 200 to 600 feet tall, no precise details remain.
The lighthouse was destroyed by earthquake in the 14th century.