Ancient underground alien base uncovered by mysterious disc-like gateway on Mars?

The Curiosity rover continues to capture fascinating anomalies on the Martian surface. In this instance, researcher Jean Ward has examined a particularly intriguing discovery: a disc-shaped object embedded in the side of a mound or hill. 

The images were taken by the Curiosity rover’s Mast Camera (Mastcam) on April 30, 2025 (Sol 4526). To improve clarity, Ward meticulously removed the grid overlay from the photographs, enhancing the visibility of the object. 

To provide better spatial context for the disc’s location, Ward assembled two of the images into a collage. In the composite, you can see the surrounding area including a ridge, and the small mound where the disc appears partially embedded, possibly near the entrance of an opening. 


The next image offers the clearest view of the anomaly. Ward again removed the grid overlay and subtly enhanced the contrast to bring out finer details, as the original image appeared overly bright and washed out. 

In the close-up, displayed at twice the original scale, the smooth arc of the disc is distinctly visible. Its texture seems unusual, resembling stone or a slab-like material, flat yet with a defined curvature. 


Might this disc-like structure have been engineered as a gateway, part of a hidden entrance leading to an architectural complex embedded within the hillside, hinting at a long-forgotten subterranean stronghold once inhabited by an extraterrestrial civilization? 

Links original NASA images: 
https://mars.nasa.gov/raw_images/1461337/ 
https://mars.nasa.gov/raw_images/1461336/
https://mars.nasa.gov/raw_images/1461335/