The Smithsonian National Museum of African American History and Culture was completed in September of 2016. It is clad in perforated bronze. There are three tiers to the building that are angled outwards towards the sky. One of the key features of this building is the waterfall in a dark room with a skylight above it. This was done as a symbol for it to a be sort of a rocket ship from space as a reflection. I think this building is unique in its design as it stands out from the rest of the mall in the Smithsonian.