For Nantes, Tadashi Kawamata designed Belvédère de l'Hermitage. The structure, made of wood, opens with a long, narrow footbridge, slightly sloping and enclosed by high palisades, which offers a framed perspective on the sky and the river. This straight and stable pathway extends, without palisades, in a cantilevered position above the cliff.

The visitor, with a feeling of vertigo, advances towards the void and discovers the unobstructed and unobstructed view of the city and the river. Literally in the landscape, he perceives under the planking a chaotic tangle of beams hanging from the cliff which evokes the round and precarious shape of a swallow's nest. In order to blend in with the surrounding landscape, the artist chose two types of wood: bilinga, an exotic wood, for the load-bearing structure, and pre-grained larch for the decking, the palisade and the nest's latticework.

The footbridge is 2.80 metres wide and 36 metres long, including a 10-metre cantilever over the cliff, almost 20 metres above the ground.