Final answer:
Evidence of a sophisticated past civilization's influence, according to Hancock, can be particularly observed at Stonehenge, a site that exemplifies ancient engineering expertise in moving and fitting substantial stones.
Step-by-step explanation:
According to Hancock, evidence of the influence of a sophisticated past civilization can be found at Stonehenge. This prehistoric site, dating back to 3000-2000 BCE, is located in England and showcases how ancient societies managed to carve and move massive stones without the technology we have today. Other similar historical sites that demonstrate this remarkable engineering ability include the Egyptian pyramids, the Greek Parthenon, and Machu Picchu, among others. These sites provide insights into the capabilities and organization of these ancient civilizations, illustrating their sophisticated knowledge of construction and architecture with their complex structures and precise stone fitting.