And some of us, it seems, are ready to jump on anything and everything unexplained and believe it's a spaceship.
Lemuria: Lots of modern BS. Not even invented until the 1800s.
Mu: Again, invented in the 19th Century to explain later civilizations. No ancient records at all.
Minoan civilization: A real ancient civilization, recently discovered. The only thing special about it is that it's an ancient civilization recently disovered.
Thule: A mythical, possibly real land, mentioned several time in ancient and medieval sources. The problem is that every mention refers to something different than the others. May be the Orkneys, may be Iceland, may be Norway, may be anything. Nothing special about it.
ancient ET wars on earth: Now that's a good joke. Lots of sites formed by True Believers, no real evidence at all. Here's a good link you led me to:
http://www.philipcoppens.com/bestevidence.html
The one you forgot to include in your Google list was Atlantis, or you would have known that from its mention by Plato it was likely an Island in the Mediterranean (the 'Pillars of Herakles') referred to many different landmarks, not just present-day Gibraltar). Thera is a good candidate, as it was apparently destroyed by tsunami due to volcanic action.
http://en.wikipedia.org/wiki/Atlantis
If this thing turns out to be an ancient spaceship I'll be amazed and delighted, for I would love to find such evidence. But if it turns out to be something else, will you stop believing? No, you'll just look for more, because you are a True Believer, and this stuff is your God, and I'm rapidly losing any respect I had for you. Sorry.