Oplontis was an ancient Roman site near Pompeii in Italy. Today it refers to the group of villas in the middle of the modern town of Torre Annunziata. It is part of Unesco World Heritage site "Archaeological Areas of Pompeii, Herculaneum, and Torre Annunziata."
Oplontis is best known for the sumptuous Roman Villa Poppaea, once owned by the Emperor Nero. The eruption of Mount Vesuvius buried it under a deep layer of ash on August 24, AD 79.