Oh yeah these days I'd expect an equivalent work to be something akin to a fully fortified manchester with glacis walls tens of miles thick
Walled towns used to be a thing, so that would be a pleasing mix of tradition and modern capabilities

Or we could partially cover a small monument with a pile of dirt and charge people £6.25 to walk up it. That would show that we're a world class country. I'm sure it would work just fine and make loads of money.