English eccentrism vs North American invention
An English folly is an impractical, fantastical, aimless, obscure and ersatz structure which seems to exist in the landscape mainly to prove only that some elite people have more money than sense. They are often more like a subtle puzzle instead of a laugh-out-loud joke.
In North American gardens, a similar intent leans more towards ornamental, colourful, attention-grabbing surprises. The design can be whimsically utilitarian or unexpectedly functional, often at little cost. It is also egalitarian, depending more upon creativity rather than socioeconomic class.
So do you have a preference for humour or humor? Or a favourite example of either?