The smallest of the three pyramids that are in Giza, belongs to an Egyptian Pharoah Menkaure. Around 4500 years after its construction, a British explorer, Howard Vyse thought of diving inside and finding its riches. He found in it a detailed Sarcophagus of the pharaoh that the pyramid belonged to.
He thought of sending this invaluable sarcophagus to the British Museum in London and loaded it on a ship. But that ship never reached its destination, and instead, it sank during the voyage and took that sarcophagus with it.