The nearby LightRails tunnel! American artist Bill FitzGibbons has sent us photos of a light sculpture he created called LightRails. It is located at the Street underpass in downtown Birmingham, Alabama and is composed of a computerized LED light system.
"Cover rocks with mirrors and they look like melted disco balls." I don't think these are rocks but if you could find a "melted" looking rock you could cover it it pieces of mirror or CD's to create a "Melted Disco Ball".