Weird Structures found on Mars?

This photograph (ESP_013177_1800) was taken by NASA’s Mars Reconnaissance Orbiter (MRO) HiRISE Camera on 19 May 2009.

NASA describes this photograph as “Possible Rootless Cones in Hydraotes Chaos.”

I discovered what look like artificial structures on the Martian surface. These include what appears to be a building, dam walls and an underground entrance-way amongst others

Pure speculation as always, these anomalies look like something unnatural and are not specifically something unnatural.

Madagascar-type razor-sharp limestone formations? (click for larger image)

Building with a terrace and pillars, or perhaps pipes and bridge leading to more tech-debris? (click for larger image)

Another triangular area inside a crater/pit on Mars that appears to be machined leading to perhaps another underground entrance-way? (click for larger image)

Wall or pipe on crater/pit edge? (click for larger image)

Original NASA source: https://www.uahirise.org/ESP_013177_1800

I downloaded the HiRise B&W Map-Projected JP2 file to view these anomalies.

Are these natural Boulders/Rocks or perhaps sign’s of some kind of activity on Mars?

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