Mars tower found in NASA rover photo by Streetcap1, Sept 17, 2016, Video, UFO Sighting News.

Date of discovery: Sept 17, 2016
Location of discovery: Mars
Source photo: http://mars.jpl.nasa.gov/msl-raw-images/msss/01450/mcam/1450MR0071790360703142E01_DXXX.jpg

This Mars monolith was found by Streetcap1 of youtube. It has a lot of similarities in shape to the Washington Monument, but this one is of course shorter and fallen over. Notice how the bottom of the monument contains a lot of earth (round end). Its like a tree or sign thats been blown over, the tree has dirt around its roots, or the sign has cement that was pulled out of the dirt (I saw that today a lot after the typhoon here in Taiwan).
Scott C. Waring

Streetcap1 states:
This is way in the distance on a recent MARS Curiosity Rover photo so must be quite large. This is the best close-up I could get on it, but it does look straight-edged even from such a distance. Streetcap1.