The article 'List of missing treasures' is a great launching point. While there are many fantastic things in there, I particularly enjoy learning about all of t

The article 'List of missing treasures' is a great launching point. While there are many fantastic things in there, I particularly enjoy learning about all of the artifacts from rulers of past that have been lost to time, and are theoretically out there somewhere in the water or some farmer's field. https://en.wikipedia.org/wiki/List_of_missing_treasures https://en.wikipedia.org/wiki/List_of_missing_treasures