The power of mother nature, the artist... 
A beach in Fort Bragg, California that became dumping ground for people's waste in the earlier part of  the 20th century. 
By the 1960's there was a clean-up initiative, but they were unable to totally remove all the glass that was left. 
Several decades later, with a constant beating from the sea and sand particles, all the broken glass has transformed into round pebble-like forms, resulting in a glittering glass beach - beautiful!
Source: here
 

 
