It looks nice. Maybe an HDR here would look cool, have you thought of that? It would provide a little more detail and the overexposed areas could be more controlled.

One thing I dislike and this seems to be with all your photos, it looks a bit shaky. What's up with that? It's a bit distracting...

Very nice colors and details...beautiful place.
Carlos

Gr8 compo Bruno!! Agree with nazgulled, HDR may work better!!

Yes, I'd try an HDR although underexposing this might work too. For this shot I'd try increasing the blacks for more contrast although the overexposed areas are too burnt out to probably expose any details in them. You might try the shadow/highlight tool in PS and just use the highlight to try for a bit more detail.

Very nice! Actually I like the overexposed area in this one, it looks allmost like some sort of fire line Agree with nazgulled about the shakyness in this one though

Gary said a lot of what I was thinking too. Your horizon is also a little tilted as well, but I think with a possible reshoot and maybe some more post processing this could be more dramatic.

It's always hard to get shots of stuff like this, but I think you are definitely on the right track! That line of light leading along the bottom of the rock is a nice leading line as well, showing the way out of the tunnel!

Very cool place! I agree with nazgulled about the HDR solution for this place.

Nice compo you really should try the HDR solution, weldone!

nice work

It's an interesting place for sure. The blue at the end provides a nice focal point. A shame about the overexposed parts

Yep, quite interesting shot.

Watch out for those overexposed sections...

Nice place for a comp!

Pity about the burned area. Nice shot.