1. The mark left by the barber over the years in his salon.
2. Six months' worth of waste in a pipe used in a spa's swimming pool.
3. These sandbags, over 40 years old, have turned into rocks.
4. "The knife my grandfather carried for 40 years, compared to a new one of the same model."
5. The lion's head from the Parthenon in Nashville, USA.
6. The incredible passage of generations.
7. "The place where I play ping pong hasn't changed its tables in the last 20 years."
8. New York building before and after a deep cleaning.
9. Tree planted on a grave.
10. Cars abandoned in a forest for 20 years.