Where is the most famous megalith formation?

The most famous megalith formation is Stonehenge, located in Wiltshire, England. This prehistoric monument consists of a circular arrangement of massive stones and is believed to have been constructed around 2500 BCE. Stonehenge is renowned for its alignment with the solstices and is a significant site for archaeological and cultural studies. It attracts millions of visitors each year, making it an iconic symbol of ancient engineering and mystery.