Light

In this image you can see the light from the sun coming in through the forest canopy. There is a lot of sub-surface scattering of the light as it looks like a lot of leaves themselves are glowing. This is causing a lot of green light to fill up the photo despite the sun being the only light source and throwing white light down. The amount of light is also making the trees look black when they are probably more likely a brown colour.

This is an HDR photo, done by taking multiple exposures of the same image and then manipulating them to get a striking image such as this. It has also had the effect of negating one of the problems with a photo like this. It has removed the transparency that water gains the closer it gets to the camera, due to the light bouncing off it at at a deeper angle than it is at the far away shore. The reason the reflection is sharper at the far edge of the water is because the light reflecting off of it is coming in at a shallower angle.

 The light here is coming from the lava. You can see that the light is being scattered through the smoke. Smoke is made up of solid particles and the glow you're seeing are the electrons of light hitting those solid particles and bouncing around, thats why the light is less intense than at the lava source.