This is the most impressive water treatment building in the world! During the 1870s – a period of high growth for Buenos Aires – the capital city suffered yellow fever because of poor sanitation. The solution? Build a palace. This magnificent, block-long building has beautiful coloring, French Renaissance flair and over 300,000 terracotta tiles created by Royal Doulton. All of this grandeur housed a waterworks system. It is called Palacio de Aguas Corrientes or Water Company Palace. Inside is a small yet fascinating museum.