Regal Ruin is the third level made available for play in Sonic R. It contains two Chaos Emeralds and collecting all five Sonic tokens will allow you to race against and unlock the Egg Robo.
Instruction Manual Description
||These ancient Egyptian remains are an archeologist's dream (or a nightmare, depending on if you like mazes or not). The main path is pretty easy to follow, but there are many little roads and nooks which could be hiding treasure, so search well! Springs might help you out of tight spots in this course.