Spite House

A spite house is a building designed (or heavily altered) to annoy neighbors or anyone with a stake in nearby land. Since living in them isn’t the main goal, these houses often feature odd, impractical designs meant purely to irritate! You can learn more about these quirky structures in the Wikipedia article on spite houses.
#6 Actually a really cool list
#19 I remember when I first found out that the Roman statues used to be paint to make them appear lifelike. Creepy.