[Who is John Galt?]

Follies—decorative structures that serve no practical purpose—were a fashionable way to flaunt wealth...

Numerous parts of the federal government come instantly to mind...

[madison10]

It looks like a much-older-than-Victorian church.

[Hot Tabasco]

Probably the same folks who buried the yet undiscovered treasure on Oak Island.......

[Sacajaweau]

Much too much time on their hands.

[HartleyMBaldwin]

“One possible explanation is that the grotto was the project of an eccentric Victorian aristocrat.”

Must have been a time traveler, too, since the grotto was discovered before Victoria took the throne.

[Menehune56]

Read later

[BozoTexino]

I was in Maidstone, Kent, years ago. I never heard of this until now.

[Bob434]

See cool. Love seeing stuff like this. Thanks for posting it

[Sequoyah101]

The planning it took to do this may have taken as long as doing it. I doubt we have an adhesive good enough to last this long in a damp environment.

It was not a Victorian who did this. Queen Victoria was born in 1819 and took the throne in 1837. Somebody should know better than to date it at that period.