Very nice shots. For my taste the greens in the first one are a bit "too much", but that's just me. The second one is very cool and the "whatever it is" in the foreground makes it very interesting.
My favorite is #3 though. I absolutely love what good tonemapping can make out of old wood/metal and generally aged industrial/technical stuff. Love the small details in there, too.
the yellows in the first picture look overdone. also, the coastline across the water looks like it's lined in gold...probably not the case. work on those yellows a bit too