This is the city of Petra in Jordan. I am completly amazed by this feat as it was constructed in 100 BC. Petra is now one of the new Seven wonders of the world, and is also a World Historical Site. Of the many buildings that make up Petra only is freestanding, all others are carved out of the mountain. The one freestanding building has been almost completely carved out of rock with the exception of that of wood that has been laid in between layers of carved stone to help absorb shock from earthquakes. The fact that in 100BC they were able to apply this kind of knowledge of building materials this early in our history, and for it to have lasted this long with very little damage and is still standing today with very little upkeep. Today, we simply don't have the use of materials and strength to last that long without constant upkeep.
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