Guess the French region with the help of this clue: What a wonderful eyeful

In which of France's 13 regions was this photo taken?

This railway viaduct in was built by Gustave Eiffel and opened in 1885

This railway viaduct was built by Gustave Eiffel and opened in 1885.

It featured in the 1976 film The Cassandra Crossing to represent the condemned 'Cassandra Crossing' bridge.

Can you guess where it is located?

Click to show answer
A) The Garabit railway viaduct in Cantal, in the region of Auvergne-Rhône-Alpes
An alternative view of the red bridge