Eric Staller drives by in his illuminated Volkswagen Beetle in San Francisco, Calif., on Wednesday, November 3, 2014, as part of Illuminate SF. Illuminate SF is a series of free holiday art tours to light installations around the city that include ""Firef

Eric Staller drives by in his illuminated Volkswagen Beetle in San Francisco, Calif., on Wednesday, November 3, 2014, as part of Illuminate SF. Illuminate SF is a series of free holiday art tours to light installations around the city that include ""Firefly,""on the San Francisco Public Utilities headquarters, ""Sky Garden"" on the Federal Building, and ""Caruso's Dream,"" a set of pianos made of glass and steel that hang over the sidewalk on Ninth Street. Brian Goggin and Dorka Keehn, artists of Caruso's Dream joined the group to discuss their installation. (Photo By Carlos Avila Gonzalez/The San Francisco Chronicle via Getty Images)