There is a regular street art festival in Grenoble. https://www.streetartfest.org/
Some are huge.
Some are not.
Can you believe your eyes?
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Even the youngsters have a go with a stick-up.
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Street art on corten steel!
Street art on a scruffy old wall.
How to make a harp from a boring chimney.
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My favourite.
Grenoble is surrounded by mountains.