It’s still the world’s largest unreinforced concrete dome. In addition to being filled ... eventually turning left to head to another famous Rome landmark, the Spanish Steps.

The Pantheon we see in the heart of Rome today was built around ... while adding visual depth, and the famous oculus, a broad circular opening at the dome’s top, not only lets light pour in ...

It leads participants through the labyrinthine alleys and byways of Rome, each uncovering layers of history and tales of yore that are often overshadowed by the city's more famous attractions.