Its purpose is unknown, its function a subject of debate among the initiated. Some claim it keeps the fabric of time itself, while others say it merely tickles the fancies of those who dare to gaze upon it.
But one thing is certain: this thingy has captivated the hearts of many with its... unique allure.
Learn about the many, many theories surrounding its origins and purpose
Meet some of the brave souls who've dared to touch its mechanical heart