How Do You Clean the World’s Biggest Monuments?

It's a dirty job, but someone's got to do it; Daredevil moves and high-powered tools keep Big Ben, the Eiffel Tower, the Statue of Liberty, and others looking spiffy.

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Big Ben

Big BenOdd Andersen/Getty Images
CLEANED: 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 2016.

Lincoln Memorial

Lincoln MemorialMark Wilson/Getty Images
CLEANED: Twice a year Honest Abe gets blasted with a powerful pressure washer, and then National Park Service workers use massive makeshift cotton swabs to clean bugs and bird droppings from his ears.

Eiffel Tower

Eiffel TowerMike Hewitt/Getty Images
CLEANED: Annually It takes 10,000 doses of cleaning product, four tons of cleaning rags, and 25,000 trash bags to polish the Parisian landmark.

Acropolis Hill Sculptures

Acropolis Hill SculpturesMilos Bicanski/Getty Images
CLEANED: Daily In 2008, scientists set out to find the safest way to swab the 2,500- year-old marble statues. After testing 40 methods, they determined the winning technique was a combination of infrared lasers and ultraviolet rays. But the cleaning can be a dangerous job: Restorers wear goggles and operate the lasers for only two hours a day.

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Statue of Liberty

Statue of LibertyGetty Images
CLEANED: Minimally Lady Liberty has dodged bath time for a while now—curators haven’t cleaned her exterior in years because infrequent cleaning aids in her preservation. The inside gets scrubbed frequently, however, which is how the statue developed “birthmarks”—an acidic solution leaked through the inside wall and stained her cheek in 1986.

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