1 – Stonehenge
Stonehenge is a composite structure, formed by concentric circles of stones, reaching 5 metres in height and weighing almost 50 tonnes, located in England in the county of Wiltshire. Much of the mystery surrounding this structure relates to the positioning of the stones and how it was built and for what purpose. In 2014, archaeologist David Jacques was able to conclude that that area had not been inhabited since 8820 BCE and that that structure was not meant to be isolated. This discovery led to a change in the concept of the Neolithic Revolution and also a change in strategy by researchers for studying Stonehenge.