Every five years or so, crew members scale the 316-foot-tall clock to scrub its four timepieces, each containing 312 pieces of opal glass. And time doesn’t stop: Workers dodge the moving minute and hour hands, which measure nearly 4.2 metres and 2.7 metres long, respectively! The next scheduled cleaning is in the early 2020s.
Twice a year, Honest Abe gets blasted with a powerful pressure washer. (Did you know there’s a typo on the Lincoln Memorial?) National Park Service workers then use massive makeshift cotton swabs to clean bugs and bird droppings from his ears.
It takes 10,000 doses of cleaning product, four tons of cleaning rags, and 25,000 trash bags to polish the Parisian landmark. Workers do it once a year.