Managua waste water to a new water treatment plant at Las Mercedes in Eastern Managua in May 2009 relieved old concerns over water pollution and native wildlife, and brought some residents closer to the old city center and the rest of the mainland. Managua is located on the southern shores of Lake Xolotlán, also known as Lake Managua. Lake Xolotlán contains the same fish species as larger Lake Cocibolca in southeastern Nicaragua, except for the freshwater sharks found exclusively in the latter. Once a Managuan scenic highlight, the lake has been polluted from the dumping of chemical and waste water since
Managua the Old Cathedral of Managua was designed by Belgian architects, and the iron that was used to shape the core of the cathedral was shipped from Belgium. Construction lasted from 1928 to 1938, overseen by Pablo Dambach, who was a Belgian engineer residing in Managua. The architects had been inspired by the church of Saint-Sulpice in Paris, France. The St. James' Cathedral became the first cathedral in the Western Hemisphere to be built entirely of concrete on a metal frame. The cathedral survived the 1931 earthquake, but was heavily damaged during the 1972 earthquake, which eventually led to the construction