Two nice bridges seeming twisted
In Bolzano, in front of the Museion, the two beautiful bridges over the river Isarco (one for pedestrians and one for bycicles) have a strange shape:
they give us the impressione to be "twisted" and this originates in mathematical fact: the centre line of these bridges is not a plane curve.
This example has been used in one of the ten signposts of the MIC project "Maths in the city".
You can see the two bridges from a different point of view.
© Fabiana Marchesini
foto di Fabiana Marchesini