an ongoing collection by cadmonkey

Note, from Wikipedia: In architecture, a folly is a building constructed primarily for decoration, but suggesting through its appearance some other purpose, or of such extravagant appearance that it transcends the range of usual garden buildings. As a general term, "folly" is usually applied to a small building that appears to have no practical purpose or the purpose of which appears less important than its striking and unusual design, but the term is ultimately subjective, so a precise definition is not possible.