Imagine finding a Roman galley out in the Atlantic, or even more than one. I'm always amazed Madeira and the Azores weren't colonized before the Portuguese arri

Imagine finding a Roman galley out in the Atlantic, or even more than one. I'm always amazed Madeira and the Azores weren't colonized before the Portuguese arrived in the early 1400's, even though there are possible Roman, Viking, and Genovese references or evidence. https://en.wikipedia.org/wiki/History_of_Madeira https://en.wikipedia.org/wiki/History_of_Madeira https://en.wikipedia.org/wiki/History_of_the_Azores https://en.wikipedia.org/wiki/History_of_the_Azores Another thing that fascinates me are seamounts: volcanoes that either didn't reach the surface or that did but later eroded and subsided. With sea levels 100-150 ft lower in the last ice age, many eroded to that level, leaving a flat-topped mountain that far beneath the surface. It's too deep for normal scuba, but amateur underwater drones could easily explore them.