There was a number of Aztec temples but the main one was discovered by FMB and FnD at coordinates 777 777 after David was whispered to by the server saying "7" over and over.
777 777 Edit
The most influential Aztec Temple was found during Davids whispering by an unknown voice speaking over and over again "777, 777" FMB and FnD followed the whisper of 777 to the coordinates of 777, 777 although no one but david could hear the whispering. Once at the coordinates, they found a hole in the ground leading to this Aztec Temple. The Temple was filled with puzzles and Traps which the team go through with out aid of their gear.