Towards the river, the most dynamic metal elements express the fluidity of water, elements of nature (like a flower), figures of boats and even representations of fish (fish are common in Gehry's repertoire, such as the sculpture on the coast of Barcelona). In addition, the architect draws a reference to sculptures workshop Constantin Brancusi (of different sizes and shapes), the film Metropolis by Fritz Lang (1927) and the very energy of the city of Bilbao.