• MIA003: The Fort

MIA003.1 The Fort - Mars Express 2006

Image credit: ESA/DLR/FU Berlin (G Neukum) CC BY-SA 3.0 IGO

Image source: http://spaceinimages.esa.int/Images/2006/09/Cydonia_region_colour_image

MIA003: The Fort



Mars Report Ref: MIA003

Report Date: July-August 2017

Research Status: Open - Possible building/monument

Description: The Fort
Approximate size:  2.8 km /1.7 miles

Mission images/dates: Viking Orbiter 1976, MGS 2001, Mars Express 2006
Location: Cydonia Mensae

Found by: Richard C. Hoagland

Image credits: (See image captions)

Graphics/image editing: M. J. Craig

Image sources: (See image captions)


The striking triangular shape which appeared in the Viking image of 1976, seemed then to be a strong sign of possible artificial design. More recent pictures reveal a very different character to this feature, but which still show a highly interesting and enigmatic structure.


Rounded northern edge with straight eastern edge leading to a sharp right angle. Several features display an inherent harmonious layout.


A remnant massif formed by geological erosion.

MIA003.2 The Fort - MGS 1999

Pixel width: 4.3 m

Image credit: NASA/JPL/MSSS

​Image source: https://ida.wr.usgs.gov/display/MGSC_1044/m04019/m0401903.imq.jpg

MIA003.3 The Fort - Geometric Perspective - MGS 1999

Image details: (see MAA-003.1)

 MIA003.4 The Fort - seen by Viking in 1976, MGS in 1999 and Mars Express 2006

Image credits: (Left) NASA/JPL (centre) NASA/JPL/MSSS (right) ESA/DLR/FU Berlin (G. Neukum)

Image sources: (Left)  http://nssdc.gsfc.nasa.gov/image/planetary/mars/f035a72_processed.jpg

(Centre) https://ida.wr.usgs.gov/display/MGSC_1044/m04019/m0401903.imq.jpg

(Right) http://spaceinimages.esa.int/Images/2006/09/Cydonia_region_colour_image