Folly
Amusement parks, fairgrounds, and expositions often have fantastical buildings and structures. Some of these are follies, and some are not; the distinction, again, comes in their usage. Shops, restaurants, and other amusements are often housed in strikingly odd and eccentric structures, but these are not follies. On the other hand, fake structures which serve no other purpose than decoration are also common, and these are follies.