Complex sentence: In assembling the walls of Pumapunku, each stone was finely cut to interlock with the surrounding stones and the blocks fit together like a puzzle, forming load-bearing joints without the use of mortar.
Split into simpler sentences: In assembling the walls of Pumapunku, each stone was finely cut to interlock with the surrounding stones. The blocks were fit together like a puzzle, forming load-bearing joints without the use of mortar.