5. Actual Piece of Cable (GTA: San Andreas)

The Gant Bridge in San Andreas really is quite an impressive piece of architecture. Modelled after the real-life Golden Gate Bridge in San Francisco, it connects the fictitious areas of Juniper Hollow and Palisades in San Fierro to Tierra Robada and Bayside in the Grand Theft Auto universe. It is 159.7 meters long, 60.3 meters above sea level, consists of 15,000 polygons and 11 textures, and takes up 1.27mb of disc space. How do I know all that? Because of one of a few signs near the bridge providing such information, including a piece of cable supposedly taken from the bridge on display sitting on a plinth, coupled with a sign reading:
"Oooooh amazing "That's mind blowing "Actually, no, it's simple physics and not really that impressive"
4. "There Are No Easter Eggs Up Here. Go Away" (GTA: San Andreas)

Staying with the Gant Bridge for a moment, if you commandeer a helicopter (or use a jetpack) and land it on top of the bridge's southern suspension tower, you will come across a sign that reads "There are no Easter Eggs up here, go away". On the northern suspension tower is a parachute for you to jump back down with, if you so wish.