Casa Grande Ruins National Monument is a collection of ruins of a number of structures, including the 4 story high ‘Big House’. This Hohokam village was abandoned around 1450.
While the structure survived harsh environments for centuries, in the 1930s the park service built a ramada over it to protect it. An earlier wooden one was built in 1903, but did not stand up to the weather well.
There are a number of other much smaller ruins throughout the area.
A closer look at Casa Grande shows the amazing abode structure in detail (along with a plethora of birds)
RDZ Photography 