Pluto's Gate

The Ploutonion at Hierapolis or Pluto's Gate was a ploutonion in the ancient city of Hierapolis near Pamukkale in modern Turkey's Denizli Province. The site was discovered in 1965 by Italian archaeologists, who published reports on their excavations throughout the decade. Following the studies carried out on site in 1998, a geologist of the Italian National Research Council, Luigi Piccardi, recognized that the origin of both the Ploutonion and of the nearby Apollo's Oracle of Hierapolis was linked to the existence of the surface trace of a seismic fault, on which both sanctuaries were purposely built and which was revered as Gateway of Hades. In 2013, it was further explored by Italian archaeologists led by Francesco D'Andria, a professor of archaeology at the University of Salento. As part of a restoration project, a replica of the marble statue of Hades and Cerberus has been restored to its original place. The statue is known to have been there in ancient times.

Source: Wikipedia