Photoshop - Remove distortion with Puppet Warp

Besides moving appendages and creating special effects with the Puppet Warp tool you can use Puppet Warp to fix problems in photographs.
Lens correction is a great tool but doesn't always get the job done for distortion. The next time you're having problems fixing a crocked wall or horizon consider trying the Puppet Warp tool.
In my example, the wide angle lens caused some distortion on the horizon.

 

I fixed the distortion using Puppet Warp. The red line indicates where the distortion was before and after.

Open your problem photograph then click on Edit > Puppet Warp.

Add as many Control points as needed. In my example below I added 3.

Select a distortion point and drag the point until the distortion is removed.

 

That's all there is to it. Continue to drag your points until all distortion is removed.