The cave is real

That "abandoned, decaying cobblestone path" is fake, but it is neglected. The stones are fake are there is clearly an artificial underlay, like the whole path was delivered in a roll and they laid it all the way down to the crick.

This pic has strong dream energy. Def feels like somewhere I've seen in a memory

Looks fake.

Perfect to hide your Delorean under when time travelling!

What does that sign say?

The path may be just a retaining wall built by laying quickcrete bags and watering them in place.

There's definitely a lich guarding that cave. Possibly a grue if you get far enough in.

I was thinking 'Dark' but same difference. Something timey wimey with that cave.

Just keep a light on and you'll be safe from the grue. IDK what you'd do against the lich tho. Good luck, I guess 🤷‍♂️

How about a nice game of Joust?

There are two signs mounted n there, warning about the dangers of cave collapse and saying this is a protected habitat for bats.

No there's a layer of something rubbery/plasticy meant to hold the thing together. I guess it kind of prevents erosion but also is gross

The plastic is probably something like weed cloth, to prevent plants from overrunning the path

I agree on Dark, and I like to make pictures