Tourists visit the "hypogeum" area of the Colosseo in Rome, Italy, on Aug. 24, 2021. The "hypogeum" area of the Colosseo, containing underground tunnels and rooms where gladiators and wild animals once prepared for battle, was accessible for visitors from June this year.(Photo: Xinhua)
Tourists visit the "hypogeum" area of the Colosseo in Rome, Italy, on Aug. 24, 2021. The "hypogeum" area of the Colosseo, containing underground tunnels and rooms where gladiators and wild animals once prepared for battle, was accessible for visitors from June this year.(Photo: Xinhua)
Tourists visit the "hypogeum" area of the Colosseo in Rome, Italy, on Aug. 24, 2021. The "hypogeum" area of the Colosseo, containing underground tunnels and rooms where gladiators and wild animals once prepared for battle, was accessible for visitors from June this year.(Photo: Xinhua)
Tourists visit the "hypogeum" area of the Colosseo in Rome, Italy, on Aug. 24, 2021. The "hypogeum" area of the Colosseo, containing underground tunnels and rooms where gladiators and wild animals once prepared for battle, was accessible for visitors from June this year.(Photo: Xinhua)