Mysteries of Days Gone By

One night I was looking at some other images, and a whole bunch of these types of images came up. Some I could tell were outright hoaxes. Others??? Well, they bore looking into. So here is a board of past mysteries that I will perhaps look into someday, or perhaps I won't. They might be true, but I believe in a young earth, so will dismiss something with a timing of more than 6,000 years.