Basilica of St. Paul Outside the Walls is not just a house of prayer, but a well-known tourist attraction as well. Make a pilgrimage and enjoy a moment of contemplation.
You're spoiled for sightseeing choice when staying in Ostiense. Basilica of St. Paul Outside the Walls is a great place to start here, but there are numerous other worthy sights to experience. St. Peter's Basilica, Roman Forum, and Piazza Navona are not far from the house of prayer and will top off your day nicely.