Because it was buried for newer palaces for centuries, the Domus Romane di Palazzo Valentini—or Roman Houses of Palazzo Valentini—archaeological site is well-preserved today, and visitors can still view original staircases, frescoes, mosaics, and inlaid marble pavement, which is protected by a glass floor. Multimedia light shows bring the ruins to life, revealing how these elegant villas—owned by Imperial Rome's most powerful families—once looked and offering visitors a glimpse into life in ancient Rome. In addition, a newly unearthed underground area opposite Trajan's Column holds the remains of a monumental public building; a virtual reconstruction of the column and its surrounding area show what they looked like during their heyday. These archaeological sites are only open to the public via a guided Roman Domus of Palazzo Valentini tour, so it’s essential to book ahead.