( CNN ) Another one for the `` tourists behaving badly '' file . Two American women have reportedly been arrested for carving their initials into a wall with a coin inside Rome 's Colosseum . Daily Italian newspaper La Stampa says the women , aged 21 and 25 , were spotted carrying out the act by fellow tourists , who then told security . The two letters -- J and N -- were about eight inches in length and scratched on a brick wall at the historic Roman amphitheater . The women , both from California , reportedly snapped a selfie of themselves with their initials before they were arrested . Their names have not been released . The American pair may now face a fine for `` aggravated damage '' on a building of historical and artistic interest . If one Russian 's experience is anything to go by , the price wo n't be cheap . Last November , authorities in Rome slapped a 20,000-euro ( $ 21,685 ) penalty on a Russian tourist caught carving his name into the famed landmark . The 42-year-old man was apprehended after a guard at the Colosseum saw him carve the letter `` K '' in a section of brickwork . After police caught up with him , the man was found guilty of causing aggravated damage , fined and given a four-month suspended sentence . The Russian was one of five tourists caught carving graffiti on Colosseum walls in 2014 . The earlier incidents involved two Australians -- a father and son -- and a Canadian and a Brazilian , both teenagers . Rome is n't alone in having to deal with inappropriate tourist behavior this month . Egypt is now looking into reports that one of its most historic sites was the backdrop for a Russian porn flick . According to Al Arabiya News , authorities have confirmed that an X-rated film was shot next to the Pyramids of Giza and the Sphinx and are now investigating . The video was reportedly made by Russian tourists , who then uploaded it to the Internet nine months ago . Al Arabiya reports that Minister of Antiquities Mamdouh al-Demati says the issue has been referred to the public prosecutor and new surveillance cameras are being installed in the area . The incident comes as a reminder that no world landmark is safe from the salacious urges of tourists -- no matter how sacred it might be to the locals . Cambodia 's Angkor Archeological Park experienced its own string of nudity-related incidents this year . In February , U.S. tourists and sisters Lindsey Kate Adams and Leslie Jan Adams were deported after allegedly getting caught taking partially nude photos at Preah Khan temple , one of the sacred sites inside Cambodia 's Angkor complex . They received six-month suspended prison sentences , a one-million riel ( $ 250 ) fine and were banned from entering the country for four years . In January , a group of photos featuring a topless dancer leaning against the ruins surfaced on Facebook . Early last year , Peru officials were forced to respond to a chain of `` naked tourism '' incidents at Machu Picchu , also a World Heritage Site . They detained four American tourists , two Canadians and two Australians for stripping down for pictures at the site . CNN 's Barry Neild contributed to this report .
Two American women arrested for carving initials into a Colosseum wall . Meanwhile , Egypt investigating Russian pornography film reportedly shot at Great Pyramids . Cambodia 's Angkor Archeological Park experienced a string of nudity-related incidents this year .