Mouth of Flower - Octavio Ocampo This is good art because it is an optical illusion. It could either be just some flowers with a butterfly, or you can also see a woman's face. It is very creative in a subtle way.
The Antikythera Mechanism by Michæl Paukner -- This mechanism is an ancient mechanical calculator designed to calculate astronomical positions. It was recovered in from the Antikythera wreck, but its complexity and significance were not understood