Question: Take a look at my original:
[![Original](https://i.stack.imgur.com/wnvE3.jpg)](https://i.stack.imgur.com/wnvE3.jpg)

My goal here is to get rid of the curb at the bottom right corner.

I tried doing a doing a transform -> warp but the results aren't great. Even though the image itself is not very clear, the transformed area looks very distorted.

[![Original](https://i.stack.imgur.com/KnJiy.jpg)](https://i.stack.imgur.com/KnJiy.jpg)

What else can I do to get rid of the curb at the bottom right?

Answer: 
You could use the Content Aware fill in Photoshop.

Make a selection around the offending stonework using the Polygonal Lasso, then do *Edit > Fill*, and choose *Content Aware* as the fill type

Example

[![enter image description here](https://i.stack.imgur.com/UOcsx.gif)](https://i.stack.imgur.com/UOcsx.gif)
Quick and dirty.. could be refined...

1 Copy left side area and flip it and move into position on the right.  

[![enter image description here](https://i.stack.imgur.com/3ljjD.png)](https://i.stack.imgur.com/3ljjD.png)

2 Add a **Layer Mask** and, using the **Gradient Tool** on the mask, soften the edges around the area   

[![enter image description here](https://i.stack.imgur.com/vg7d5.png)](https://i.stack.imgur.com/vg7d5.png)

3 New layer. Use a **Brush** to paint on a general area of the bright blue. Afterwards use `Filter > Blur > Gaussian Blur` to soften the edges  

[![enter image description here](https://i.stack.imgur.com/zUtcp.png)](https://i.stack.imgur.com/zUtcp.png)

4 Set this brush layer mode to `Color Dodge`  

[![enter image description here](https://i.stack.imgur.com/jySzT.png)](https://i.stack.imgur.com/jySzT.png)

5 Lower opacity of Color Dodge layer until you are happy  

[![enter image description here](https://i.stack.imgur.com/XzmU2.png)](https://i.stack.imgur.com/XzmU2.png)

The edge closest to the path still needs a little attention in the above image, but this should provide a general methodology.