Perpetual Motion Machine

The Perpetual Motion Machine is seen in the Royal Museum in Ultima VI.

Description
It is a machine consisting of several wheels and poles, that keeps itself in constant motion with its own motion, meaning that it never loses any energy and would never stop without outside intervention. It didn't appear in later Ultima games. In reality, such a machine is impossible to create, as it violates fundamental laws of energy and thermodynamics. Thus, the Perpetual Motion Machine was just a joke by Origin.