How about something a little different?
This is a beach in Kauai that for years was used as a dumping ground for old vehicles. The beach is littered with decades worth of old crankshafts, engine blocks, intake manifolds, axles/diffs, etc etc that the salt water have taken their toll on.
Never thought I'd spend hours taking pictures at a dump
I've got lots more pictures (I can post later if anyone is interested) but this was one of my favorites, so I did a quick once-over