Stone Fungus
This riddle is found in the Eastern Cemetary Mastaba.
"In Giza three pyramids stand tall. From the top of the smaller one you can see quite a lot, even two mushroom rocks, the smaller of which I lay atop of."
The prose is strained, but the directions are rational. If you perch atop the small*est* of the three pyramids, the rocks in question are almost precisely due northwest.
Wander over for a closer look.
Despite the weird shape, you can simply climb the smaller mushroom without resorting to jumping puzzles.
Claim the loot up top to complete the riddle.