Paris's oldest bridge has begun a dramatic transformation this week, as the artist JR – often dubbed the "French Banksy" – commenced inflating a colossal "cave" over the historic Pont Neuf.
This monumental, rocky illusion is gradually enveloping the 17th-century landmark, which has facilitated crossings over the Seine for Parisians for more than four centuries. By Thursday, the heart of the city appeared to host a rising prehistoric cliff.
