Big BenTolga Akmen/LNP/REX/Shutterstock
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 14 and nine feet long, respectively! The next scheduled cleaning is in the 2020s. Before you book a flight to see it, these are the 13 things airlines don’t want you to know.
Lincoln MemorialPABLO MARTINEZ MONSIVAIS/AP/REX/Shutterstock
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. Don’t miss these timeless Abraham Lincoln quotes.