Like the bridge one Fiona. Hope you don't mind but it inspired me to try out a little effect i use every now & again .... Filter -> Render -> Lighting Effects -> Omni Light. I just wanted to see if placed over the end of the tunnel, if it would provide a brighter focal point , to draw your eye through.
Not a perfect manipulation, but hopefully you can see what I was trying to achieve. Need to find a balance of the light to keep it looking natural ......mines too OTT