This is the site that tells the story. You can click on it to go there or just Google "mummies of Guanajuato".
In the 1860s, a silver-mining town in Mexico began burying their dead in a crypt…only to discover 10 years later that they had inadvertently mummified their loved ones.
These mummies died during a cholera outbreak in 1833. You can also read more about it here:
OK now, if you can after viewing this posting, have a great day, you hear?