A true marvel of modern engineering in the city of Valdivia is the Cau-Cau Bridge (Puente Caucau). It is a unique bascule (drawbridge) in Chile, spanning the river of the same name. The structure plays a key role in the region's transport system, connecting the Isla Teja and Las Ánimas districts, allowing residents and tourists to reach the coast while bypassing the busy city center.

The scale of the bridge is impressive: its total length is 90 meters, and its two movable sections, each 35 meters long, can rise to allow sea vessels to pass. A massive 54-meter control tower towers over the entire structure. The project was the first of its kind in the country, combining the functionality of a highway, pedestrian paths, and a dedicated lane for cyclists.
Beyond its vital infrastructure importance, the Cau-Cau Bridge has become a popular tourist destination. Its modern silhouette against a backdrop of lush greenery and river waters attracts architecture and photography enthusiasts, and its 24-hour operation makes it accessible for viewing at any time of day.