Close to roma termini in terms of walking distance, just exit the station turning left and with the rail line to your left the accommodation is a few blocks down on your right. I couldn't get the wifi working on my phone so couldn't access gps, had to get a taxi costing 22 euros to just drive down the road, though he took the long way. 20 min walk to colosseum. Good station to get naples train to herculeum and pompeii, best to go to ticket office rather than machines as pickpockets work the area, they'll offer to help u, beware