A few useful informations about latitude and longitude of pyramid location and their alignment can be found here :
Pyramidmatrix
According to Daeniken, these alignments are the result of aliens who gave the humans the means and ways how to make pyramids. The reason WHY however
is a mystery. Maybe it is a mesage for the future generations? Who knows...
I'm not familiar with alignment of Cydonia and Capitol Hill, maybe somebody else has more info on this.
More on Giza alignment:
In his book Fingerprints of the Gods Graham Hancock claims, with briliant analysis to back up his claims ( geological findings, astronomy data), that
Sphinx and the Giza pyramids were built around 10,500 B.C. he doesn't believe that aliens had something to do with it, his theory is an advanced
human civilisation.
Similar evindence has been found all around the world. I strongly recomend this book for anyone interested in mysteries of ancient civilisations.
Briliant book.
The post wouldn't be complete without a sceptical view on the age of the pyramids. Here is a different theory as to when the Great Pyramid was built:
Khufu did it?