We will be in Rome arriving around 4 pm at Roma Termini on June 11, 2016 (Sat).
We are staying in the Mondi neighborhood, in an apartment just south of the Roma Termini on Via Baccina.
I've purchased tickets for the Colesium/Forum/Paladine Hill to use the following day Sunday June 12.
Then on Monday we have tickets to the Vatican/Sist chapel at 11 am.
We fly out on Tuesday morning from FCO.
My question is in between those times is there a recommended Catacomb we could visit without doing too much traveling out of town? I've noted that the Capuchin Crypts monastery is fairly close to where we are staying so will try to fit that in.
What other catacombs or crypts are easy to get to, worth seeing in a short amount of time we have, and can do without booking a tour?
Please forgive my spelling. Thanks.