I found this particular article very interesting. It's possible that archaeologists have found remains of the castle that was the possible birthplace of an actual person that formed the basis for the legends of England's King Arthur. Later writings put the birthplace at Tintagel, which is where the archaeologists have found the outline of a 6th-century castle -- when Arthur was doing his legendary thing.
Now, none of this actually proves there truly was a King Arthur -- but like the discoveries of the NASA rovers on Mars, indicating it was indeed possible for life to have existed on an earlier wetter planet -- it does indicate that there could have been.
And that's cool.
Possible 6th century palace found at site linked to King Arthur