This is the 10152nd most frequent German word.
perugia
"Perugia" is not a German word; it's the name of a city in Italy.
In this context, 'Perugia' indicates the location where the sightseeing tour occurred, functioning as a proper noun.
Sha schickte mir eine Postkarte von ihrer Besichtigungstour in Perugia.
She sent me a postcard from her sightseeing tour in Perugia.
Here, 'Perugia' is used to attribute origin to the culinary delights, serving as a possessive noun referring to the city.
Die kulinarischen Genüsse von Perugia sind weltweit bekannt.
The culinary delights of Perugia are known worldwide.
Here, 'Perugia' is used as the name of a city, serving as the object of the verb 'reisen' (to travel).