These are pretty cool, actually, especially the lighting and composition of the last one is great. Despite some peaks, teh waves also look very interesting/ I also like the rock and composition of the first, the only thing I would change there are the tiny dots/rocks on the sand. Or at least put them in patches.
Regarding the Aral lake; the ships look like brothers, a bit too parallel to my taste. Atmosphere is top. There are (abandoned) ships to be found on the web; try here:
sketchfab