Excuse me if this sounds really dumb but I believe there are 2 of this little soap cars in Vestige but I also believe you took a photo of the same one twice? It’s the building across the saloon, you can see the gamble place in each of your pictures.
The shell storage is the “Laboratory” that gets added from The Dandy and the Damsel if you got Gustav and Caroline together again you should wait in the vicinity a bit and the little Saurien I posted a picture of should spawn 
@olivier_shady Thank you I will look for it later.
BTW In the little barn next to the church you can actually jump into a little alcove and behind the hay stack there is a tiny TV, a sleeping bag and one of these Pandoracorns pinata posing as a toy animal. Not sure if these are from another scrapped quest or imply that Juno has a hidden “soft” side.
You can also circle around the ledge of the cliff with the building you jump on with the first “jump pad” for a pretty hidden chest.
Will try to upload pictures later.
Edit: Oh and another neat little detail that is hard to get a pic of, but the big advertisements inside Pilfertown actually change to a little animation of bombs falling and under attack get to shelter warning during/after the big bomb.
@GrzesPL If I recall correctly there is actually another car on some other roof… atleast there are several ramps.