View of a pre-hispanic building at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)

View of a pre-hispanic building at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)

View of a pre-hispanic building at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)

View of a pre-Hispanic building known as "El Temazcal" at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)

View of a pre-Hispanic building known as "El Temazcal" at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)

A Salvadoran archaeologist works at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)

Salvadoran archaeologist Michelle Toledo works at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)

A Salvadoran archaeologist works in the maintenance of pre-Hispanic buildings at the Joya de Ceren archaeological site in San Juan Opico, 35 km west of San Salvador, El Salvador, on November 29, 2018. - Salvadorean archaeologists are launching new excavations at Joya de Ceren archaeological site in search of clues on the life, crops and structures of this legendary Mayan town known as the "Pompey of America", which was buried over 1,400 years ago by volcanic eruptions. (Photo by MARVIN RECINOS / AFP)