Dating back to the 14th century, Ponte Vecchio is well-known as one of the most famous landmarks in Florence - and it can be a truly unique experience to walk across the bridge lined with jewellery shops (many of which would be centuries-old artisanal productions). However, personally, I prefer to admire it from afar (it can get pretty crowded) and take pictures from further down the riverside walk, in the direction of Ponte alle Grazie (there are different points between the two bridges where you can snap amazing shots, so keep experimenting!).