Our friend was planning their last big score, any idea where?
FLAG FORMAT: CIT{City_Country}
1. Re-visiting the X Account
In the first part of this series, while tracing the vitrinefox alias, I found their X (Twitter) profile. They had a single post with the caption “Post score = Vacation Mode Activated” and a photo of a stone building. While it was a dead end for finding their name earlier, it is the exact puzzle piece needed for this challenge.

2. Reverse Image Search & Geolocation Extracting the image from the X post, I ran it through a reverse image search. The visual matches immediately identified the architecture and stone courtyard as the famous birthplace of Leonardo da Vinci.
A quick geographical search for this historical site confirms it is located in the small hamlet of Anchiano, Italy.
Using the required City and Country format:
CIT{Anchiano_Italy}