ROME, ITALY - JUNE 26: The mummy of a Capuchin monk is seen in the crypt during the opening of the museum in the Capuchin convent of the Immaculate Conception of the Blessed Virgin Mary on June 26, 2012 in Rome, Italy. The monastery, which was first used by Capuchin monks and nuns in 1626, has become a destination for tourists from all over the world who visit an ossuary in the crypt which contains the skeletal remains of 3,700 monks. (Photo by Giorgio Cosulich/Getty Images)
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Underneath this church in Rome, a crypt is decorated with thousands of bones

Closed until just a few years ago, this less popular tourist spot in Italy is adorned from floor to ceiling with the remains of 4,000 Capuchin friars and offers a stark warning for all who choose to enter. CNN's Antonia Mortensen learns the secrets of this unique crypt.

1:53 • Source: CNN
Spooky Places 12 videos
ROME, ITALY - JUNE 26: The mummy of a Capuchin monk is seen in the crypt during the opening of the museum in the Capuchin convent of the Immaculate Conception of the Blessed Virgin Mary on June 26, 2012 in Rome, Italy. The monastery, which was first used by Capuchin monks and nuns in 1626, has become a destination for tourists from all over the world who visit an ossuary in the crypt which contains the skeletal remains of 3,700 monks. (Photo by Giorgio Cosulich/Getty Images)
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