Which of the following structures is considered an early wonder?

Stonehenge is often referred to as an early wonder due to its remarkable construction and the mystery surrounding its purpose. Dating back to around 2500 BC, it showcases advanced engineering techniques for its time, particularly in the transportation and arrangement of massive stones. The significant alignments with celestial events suggest it may have held religious or astronomical significance, contributing to its recognition as an architectural marvel of prehistoric Europe.

In contrast, the other structures mentioned, while impressive, are not classified as early wonders. The Great Wall of China and the Colosseum are later constructions, and the Pyramids, although profound in their historical impact, typically align with the traditional category of ancient wonders that gained distinction in the later antiquity, particularly with the Seven Wonders of the Ancient World. Stonehenge, therefore, stands out as an earlier representation of monumental human achievement in architecture and construction.