If you've been playing GTA V, or at least paying attention to it since release, chances are you've heard of the Mt. Chiliad mystery. The mystery revolves around a peculiar mural found at the cable car station at the peak of Mount Chiliad, the highest mountain in GTA V. The mural shows either what seems to be the northern half of the map, a cross-section of the mountain, or both.

At the top of the image, there is what seems to be an eye, or the UFO that appears above the mountain. The glyph on the left is a reference to the sunken UFO, the one on the right is reference to the legendary Jetpack, and the cracking egg is a mystery. Players have theorized that this may be a map, and would help unravel the mystery if superimposed over the game map.