The drive through the Grand Canyon parks, typically following the South Rim to the North Rim and famed for its exquisite views of the stunning natural wonder, was second.
Fifty-six per cent of respondents named the US as the road trip capital of the world.
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Wide-open roads, driving past famous attractions and spotting wildlife along the way were identified as key criteria for a successful road trip.
"Adventurers love the USA for a road trip," said Temerity Vinson, senior director of international marketing at Hertz, which commissioned the survey. “The influence of social media has had a huge impact on destinations of choice, bringing increased awareness of less well-known areas, as well as ensuring that gems such as the Route 66 are still as popular as ever.”
While views and scenery were important for older travellers, millennials were more focused on having a “new experience”.
More than two-thirds of millennials admitted the places they see on Instagram affected their choice of location, compared to just 13 per cent of adults over 38.
In fact, 30 per cent said they were unlikely to visit somewhere if they had never seen photos of it on Instagram.
The survey also found an average of 12 photos a day are taken on a holiday or a trip.
It seems photographs made memories for younger people, as 36 per cent of millennials said they would struggle to remember their trip if they did not post a photo of it, compared to 19 per cent of over 38s.
Furthermore, one in 10 admitted to visiting somewhere purely because they wanted to share it on Instagram.
When it came to planning, British adults took an average of six months to arrange a trip.