Golden Pyramid can refer to two things, both from Wario Land 4.
The Outer Pyramid is the pyramid raided by Wario. He raids it because he reads in a newspaper articleMedia:WL4-Newspaper.png that this Pyramid has a large amount of treasure hidden inside. He then gets stuck inside the Pyramid after falling down a precipiceMedia:WL4-WarioFalling.png.
The Inner Pyramid is in the middle of the main roomMedia:WL4-Pyramid Map.png in the game. It is protected by five passages: the Entry Passage, Emerald Passage, Ruby Passage, Topaz Passage and Sapphire Passage. Upon completing all five, Wario can enter the Golden Pyramid itself. It contains one level, the Golden Passage, with the final boss, the Golden Diva following that.
The following table displays the two levels found in the Inner Golden Pyramid, with their name, icon and description.
Names in other languages