Eastern Cemetary Mastaba
A papyrus riddle location in Giza- you'll pass through here during the Precious Bonds Side Quest, should you chose to accept it.
Senu-sight shows the papyrus at the end of one of the long buildings.
Drop through the hole in the roof and snag the papyrus from a table to reveal the Stone Fungus riddle, and complete the location.
If you can't quite stick the jump back out through the roof, you can also escape by removing blocks from an ankle-height hole in the west wall.