Final answer:
Mystery Hill in New Hampshire, once attributed to bronze age Iberians, is actually a 19th century farmstead.
Step-by-step explanation:
The site in New Hampshire that Harvard marine biologist Barry Fell attributed to bronze age Iberians is Mystery Hill. However, further research has revealed that it is actually a 19th century New England farmstead. Mystery Hill is a complex of stone structures and chambers, which were initially believed to be evidence of ancient civilizations. But after careful examination, it was determined that the structures were built by European settlers in the 1800s.