A bridge becomes a mountain Paper turns into rock Paris discovers a hidden cave in the middle of the SeineTrace the conception and creation of JRs monumental installation La Caverne du Pont Neuf a transformative work that reimagines the historic bridge as a vast rocky grotto Freely accessible to the citys citizens and visitors alike but only fleetingly Conceived as a tribute to Christo and Jeanne-Claude on the 40th anniversary of The Pont Neuf Wr...