Alongside the UFO, egg, and jetpack symbols on the Mount Chiliad carving are five unexplained X marks that fans have theorized might represent locations, map coordinates, or key story moments where the three protagonists interact.
Source: Mount Chiliad (GTA V) — CC BY-SA
The iconic Mount Chiliad vista, home to the cryptic carving where those five unexplained X marks sit alongside the UFO, egg, and jetpack — still driving fans wild after all these years.
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