The Humana Healthcare Corporation was founded in Louisville in 1961. Humana has several hospitals within the city, but its headquarters at the Humana Building in downtown Louisville is a famous site. The building was began in 1982 and opened in 1985. It won an award from the National Association of Architects in 1987 and Time Magazine named it one of the "100 Best Buildings of the 1980s".
It was designed by Micheal Graves and is of postmodern design. The exterior is of pink granite and is designed so that the building looks different from each direction. The upper floors have a sloping pyramid, which gained it the nickname "The Milk Carton".
The top portion of the building is an open-air observation deck. A glass enclosure allows for a view of the Ohio River. Unfortunately following the 9/11 Attacks the deck was closed to the public.