Experience Italy's best-kept secrets at these 6 hidden gems in Rome - SilverKris
"An atmospheric subterranean burial complex along the Appian Way that provides a rare window into early Christian burial practices, featuring the Crypt of the Popes where several second- to fourth-century pontiffs were interred. While self-guided entry is available (tickets from about €7 online), guided walking tours that combine the catacomb with the Appian Way offer far richer context and access to more of the site." - SilverKris
