Really F***ing Big Rocks
The construction stones at Baalbek are huge at an estimated 1,000 + tons. However, they are miniscule compared to a couple of others.
The Devils Tower in Wyoming that was featured in the movie “Close Encounters of the Third Kind” is enormous. See some details at https://www.travelawaits.com/2559630/devils-tower-things-to-know/ Ther are a few ideas on how it was formed, but the truth is that no one knows. Its construction does not make sense for its location.
As large as Devil’s Tower is it is tiny by comparison with Ayers Rock (AKA Uluru Rock) in Australia. It is over 1,100 ft in height, has a perimeter of 5.8 miles and continues below ground by over 1.5 miles. For more details see at https://en.wikipedia.org/wiki/Uluru

I have had the good fortune to have visited Devil’s Tower and hope to see Uluru soon.