This is a shot of an art installation at Eastern State Penitentiary in Philadelphia, Pennsylvania. The artist, Ruth Scott Blackson, created the installation, 'No Trace Without Resistance'
"The artist applies new paint chips, coated in gold leaf, to the flaking walls of an existing cell. In the resulting “shimmering constellation,” sunlight on the installation may entice the visitor in the same way an inmate may have been forced to concentrate on the walls during solitary confinement. The prison’s neglect reveals something surprising and rare underneath."