Domus Aurea are the excavations of Nero’s “Golden House”. Since 2014 it is possible to visit the remains of this huge palace in a very nice way; with this guided tour where you can experience what the huge palace must have looked like at the time. The tour is only available on Saturdays and Sundays, as restoration work is underway for the rest of the week. A lesser-known Rome tourist attraction, but one of my personal favorites.