This question is for those of you who’ve traveled to Rome, or who live there right now…which is a startling proportion of you actually, taken all together.

What’s your favorite "underground Rome" site to see? Which catacombs are the most powerful and interesting to tour? Every time I think I’ve got things pretty well figured out, I discover something new – like this "Rome House" underneath Ss. Giovanni e Paolo.

What do you think??