The original NASA image is found at:
mars.jpl.nasa.gov/msl-raw-images/msss/00508/mcam/0508MR2000034000E1_DXXX.jpg
The original image was enhanced using:
GNU Image Manipulation Program/Filters/Enhance/Unsharp Mask/default settings -- one pass
The enhanced image is attached as: 0508MR2000034000E1_DXXX.jpg, with ellipses enclosing major anomalies.
Zoomed views of the major anomalies are attached as 001.jpg, 002.jpg, 003.jpg.
001.jpg -- A rectangular plate, presumed to be metallic, on the planet's surface, canted at a slight angle. The plate appears to have an underlying framework, sheathed by metal sheet. The framework is exposed at the nearest corner (lower center of ellipse), where the sheathing is absent. Something with a saw-toothed, circular shape (disk) appears to overlay the plate (right side of ellipse). Other strangely-shaped objects, scattered among natural, surface material, overlay the disk.
002.jpg -- An anomaly that looks like a vehicular seat. The back of the seat and its bottom face the camera. The seat appears to be covered with some sort of fabric. The fabric's frayed edges are visible on the seat's bottom. The color of the seat mostly matches the planet's surface, probably because the fabric has become coated with surface dust.
003.jpg -- Three anomalies are highlighted. The leftmost anomaly appears to be a vehicular cockpit section, with its nose pointed to the right. This vehicular section is open at the top. The side facing the camera, the windscreen, and the nose look to be essentially intact.
Anomaly, upper right. A humanoid, skull sculpture, atop stacked rocks. Widely speculating that this is a vehicular crash site, the skull sculpture could be a memorial monument, or a warning marker.
Anomaly, lower right. A tubular section, consisting of a framework covered by metallic sheathing, some of which is missing. The end of the tube is open at the right end of the ellipse. Note the light and shadows within the tube.
It's recommended that viewers download the original NASA image, enhance the image using GIMP, or similar software, then use an image editor/viewer to zoom-in on areas of interest. Other, minor anomalies can be found. Only the major anomalies are mentioned here.