what country and year were these manmade stone constructions built?
The Great Wall
Mount Rushmore
Itaipu Dam
Stonehenge
and The Great Pyramaid
You can find this information easily using Google or any other search engine.
Type those search terms into GOOGLE and I'm pretty sure you will be able to find the info you are looking for.
The Great Wall of China was built over many years. It was started in the 500s B.C. and was maintained, rebuilt, and added to until the 1600s A.D.
http://en.wikipedia.org/wiki/Great_Wall_of_China
Check these sites for the other constructions.
http://www.nps.gov/archive/moru/park_history/carving_hist/carving_history.htm
http://en.wikipedia.org/wiki/Itaipu
http://en.wikipedia.org/wiki/Stonehenge
http://en.wikipedia.org/wiki/Great_Pyramid_of_Giza