The Millau Viaduct

 Fantastic road to drive over.  Used it driving to the South of France about 20 years ago.

Further information - https://en.wikipedia.org/wiki/Millau_Viaduct

The Millau Viaduct, designed by the English architect Lord Norman Foster, crosses the cloud-covered valley of the river Tarn in Millau Credit: Photo: Reuters.

The Millau Viaduct is a celebrated engineering marvel because it is the tallest bridge in the world—soaring up to 343 meters (1,125 feet), which makes it taller than the Eiffel Tower. Designed by famed architect Norman Foster and engineer Michel Virlogeux, it famously transformed a treacherous, four-hour traffic bottleneck into a swift, breathtaking one-minute drive across southern France. 

Its iconic status stems from several key architectural and engineering feats:

• Record-Breaking Scale: Featuring the highest pylons and the highest road bridge deck in Europe, the entire 2,460-meter-long structure is suspended elegantly on just seven slender concrete piers
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Seamless Aesthetics: Designed to blend gracefully into the breathtaking Tarn Valley rather than dominate it, the slightly curved roadway and cable-stayed design give the bridge the ethereal appearance of a huge yacht. 
Revolutionary Construction: Because of the sheer drop below, engineers couldn't use traditional cranes. Instead, they pushed and slid the massive steel roadway incrementally over the pillars from both sides of the gorge, joining them perfectly in the middle with a margin of error of less than a few centimeters. 
Environmental & Time Savings: By bypassing the town of Millau, the viaduct cuts down on severe highway congestion. It also reduces heavy goods vehicle (HGV) emissions by roughly 40,000 tons of CO₂ a year. 

Because of its scale, beauty, and impact on modern infrastructure, it is not only a major tourist attraction in its own right but has also been featured in popular culture, including the feature film Mr. Bean's Holiday.