There are many documentaries out there claiming that how exactly Pre-Columbian Incan stone workers moved and dressed massive stones is a real mystery no one fully understands.
Is that accurate?
How did they quarry, lift, transport, and then perfectly and precisely cut these stones with such primitive levels of technology?
No, it is not at all accurate to say we don’t know how they built their temples and other structures. .
Here is a write up on Incan masonry techniques from /u/Mictlantecuhtli in /r/badhistory and here's a short version posted in /r/AskHistorians.
Edited to make it clear what I was saying no to.