more rocks,more questions

a few more pixs from the same spot, again i am new to this, fresh insight and knowledge
is welcome.

Picture #1824  reminds me of some of those lion monuments seen outside some federal buildings, libraries, etc.
The last 2 sure do look like a horse head.  You have something that is DEFINITELY worth investigating a lot further.  It is not a natural shape. 
Scour every surface for carvings of numbers, letters, crosses, "X's", etc. 
Many times, the "drawings" can only be seen when you step back a little and some may be hidden by dirt and greenery. 

Tag post,
Please ignore.