In San Luis Obispo, CA, there is a unique tourist attraction called "Bubblegum Alley." The walls of the alley are 15 ft. (4.6 m) tall and 70 ft. (21 m) long. The gum has accumulated from passers-by over a period of at least 45 years, perhaps as long as 70 years. Merchant complaints led to two cleanings, but always the gum reappears.
All shot with XE-2 and 23mm f/1.4.