From England's Westminster Abbey to Egypt's Valley of Kings, to the Sistine Chapel in Vatican City, amateur photography is prohibited in some of the world's most spectacular locations, making sure these iconic and historic sites aren't overrun with selfie sticks and people posing for Snapchat stories.
But some people have been able to creep by the rule, discreetly snapping photos while security guards aren't watching.
Some of these forbidden photos have made their way to Instagram, and we picked out 37 of our favorites.
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The Sistine Chapel is the highlight of many tourists' visit to the Vatican.
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The Vatican museum prohibits pictures of Michelangelo's famous frescoes, but that hasn't stopped Instagrammers. If you search for "Sistine Chapel" under "Places" on Instagram, you get hundreds and hundreds of results.
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Prohibited photography is no joke in the United Arab Emirates. Its government has jailed tourists for photographing the Presidential Palace, embassies and security facilities.
Last year, an American architect who was visiting Abu Dhabi for a conference was jailed after taking a picture in the city's embassy district, reports the Daily Mail.
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