The largest monument in Pelotas is the iron "Caixa d'água", which is located in the Piratinino de Almeida Square, and is the only one of its kind in all of Latin America. It was constructed in 1875, and still holds the daily surplus of water in the city. It sits atop 45 columns, and all of its pieces are made of iron. It has forms that are reminiscent of Asian architecture, though all of the materials used in construction were imported from France.