Towns & cities
Nemi
Italian comune
Wikipedia names Nemi as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Nemi. Each title’s page links to the sentence that says so.
Filming locations nearby
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Landscapes & nature
Lake Nemi
Italy · 2 km south-west
Crater lake in Italy situated 25 km southeast of Rome
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Landscapes & nature
Alban Hills
Italy · 2 km north-west
Mountain range
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Towns & cities
Genzano di Roma
Italy · 3 km south-west
Italian comune
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Towns & cities Ariccia
Italy · 4 km west
Italian comune
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Towns & cities
Rocca di Papa
Italy · 5 km north
Italian comune
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Landscapes & nature
Lake Albano
Italy · 5 km north-west
Lake south of Rome, Italy