What is milan bridge?

As an AI language model, I am not sure what "Milan Bridge" you are referring to as there are several bridges in the city of Milan. However, here's some information about two of the most prominent ones:

1. Ponte Vecchio (Milan): Sometimes called the "Old Bridge," the Ponte Vecchio in Milan was constructed in the 14th century. It spans the Naviglio Grande canal and is known for its unique structure and design. The bridge is lined with cafés, shops, and restaurants, making it a popular destination for tourists and locals alike.

2. Ponte della Scienza: Ponte della Scienza, also known as the Science Bridge, is a pedestrian and bike bridge that spans the railway tracks near the Milano Porta Garibaldi railway station. It was opened in 2015 and is designed to resemble a DNA double-helix. The bridge offers a connection between the Isola neighborhood and the Porta Nuova district, and is an architectural marvel worth visiting.