Advice on removing this shadow

[sirch]

I have tried various things to remove the shadow from this photo but I am struggling to get rid of it or blend it in convincingly, can anyone suggest an approach in Photoshop or Lightroom?

 

[sk66]

Make a selection of the top and copy to new layer. Stretch it, change layer mode, a touch of masking. < 1min.

 

[nickEnackEnoo]

i thought he meant the shadow on the left

 

[sk66]

Maybe... I would have called that "ghosting," and since there are multiples of them, I assumed the other.

 

[sk66]

Still quick easy. Clone from other side, just flip the tool.

 

[sirch]

Wow, thanks @sk66, sorry for not being clear, it was the big ghost on the LHS I was looking to remove. It never occurred to me to clone from the other side. Again many thanks, I'll do that tomorrow.

 

[sirch]

So following @sk66 advice, he's what I came up with

 

[nickEnackEnoo]

Nicely done. It looks like the eye of waking monster!

 

[ianp5a]

Ghosts? Clones? That is one scary cave!