So it's unguarded and unprotected? Or is it only because it's wet?
/basic railwayline electrics n00b
It's completely unprotected yes - generally because it's fenced off from the public.
Here is what it looks like:
The rail on the outside of the track is called the 'third rail'. Sometimes its outside of the track, sometimes its on the inside between the two tracks. Usually its on the outside. This carries 750v DC which is picked up by and powers the trains. It is live all the time and touching it can prove fatal. It's extremely dangerous.
I'm trying not to be holier than thou here as I'm pretty sure many people dont realise and it must be really tempting to pop out onto what looks like a deserted railway line for some unique pictures but it could be lethal.
Please be careful guys, stay away from the track!