Interesting! So both halves are salty, just one has a much higher salt concentration? That's what I thought, but wasn't sure. I didn't know that it was a railway that went across it.

I've known about the Spiral Jetty for a long time, I really want to see it! We talked to some guy at Antelope Island about it. I think he said it was about 92 miles from Antelope Island. There's different ways of seeing it, I know they have plane tours and I think you can reach it by driving too. Right now the lake levels are really low so it's visible, I suppose I should go see it soon before its under water again!