Look at the pictures below . If identified correctly they should suggest three words. When entered into the checker without spaces the correct three words will produce the coordinates of the cache.
The headline coordinates give a possible parking place but dont block it.
I have dug into the coffers and there is a £2 Prize for FTF in a case that the finder could reuse for their own.

You can validate your puzzle solution with certitude.
Ybpngvba uvag vf va gur Purpxre.
Jngpu guvf fcnpr vs gur chmmyr cebirf gbb qvssvphyg.