Bridges are the witnesses of history and the links of civilization. Through the pictures of bridges all over the world, we can not only see the changes of the times and the progress of technology, but also appreciate the influence of ancient bridges on modern bridges.

1. Rialto Bridge, Venice, Italy

The large waterway of Rialto bridge is the longest street (four kilometers long) running through the whole city of Venice. It has become one of the three famous bridges in Venice together with Scarch bridge and College bridge. The bridge is located on the Grand Canal in the center of Venice, Italy. It was built in 1588-1591. The bridge is 48 meters long, 22 meters wide and 7.9 meters high. It is a marble single hole bridge.

2. London Tower Bridge, UK

Tower bridge is an open suspension bridge, located in London, England, across the Thames River. It is named because it is near the tower of London. It is the first bridge from the Thames Estuary and the symbol of London. The bridge was built in 1886 and opened to the public on June 30, 1894, connecting the north and South districts of London as a whole.

3. Sydney Harbor Bridge, Australia

Sydney bridge, known as the world's first single arch bridge, is a representative building in early Sydney. The bridge was designed in 1857 and completed in 1932. It is an important bridge connecting the north and south banks of the port. Under the conditions of the 1930s, it was rare to build a bridge in the air on the sea.

4. Golden Gate Bridge, San Francisco, US

Golden Gate Bridge, located on the Golden Gate Strait in California, is one of the world-famous bridges and a miracle of modern bridge engineering. It was completed in 1937. The bridge was opened to public in 1937, with a total length of about 2.7 kilometers. It is regarded as the symbol of San Francisco. During the gold rush, the bridge was like a gate to the gold mine, so it was named "Golden Gate Bridge".

5. Barrios de Luna, Spain

Barrios de Luna, located in Luna Lake in northwest Spain, was built in 1983. It is a prestressed concrete cable-stayed bridge. It is a world-famous prestressed concrete cable-stayed bridge for long-span (main span 440m) highway. The cable distance is 8.16m. To increase the stiffness of the midspan, the inclined cables located at the balance weight of the abutment of the side span are arranged at an inclination angle of 45 °.