I must say that I find it interesting to speculate on an unknown ancient history of mankind which predates our written history.

On the one hand there are many mysteries and artifacts out there that are worthwhile for an examination, however most of these accounts are found on the websites involving new-age, pyramid power or ufos, which as a result tend to classify these issues as absurd a priori.

Currently, I am developing a website, which seeks to gather all such recordings, while attempting to come up with a plausible explanation for them. For example many so called mysteries are explainable, or debunked for that matter, e.g. Eltanin antenna, Abydos helicopter or Coso Artifact. Others may be hoaxes or misinterpretations like the Piri Reis map.

Even if they are answerable, or hoaxed, in any way, it remains interesting to clarify such records just like we do on this board regarding ‘Lunar Conspiracies’.

By filtering out the faulty ones, perhaps there remain some cases that have merit afterall.
Take for example the following cases below:

Dashka's stone: http://www.xpeditionsmagazine.com/ma...ia/russia.html
Ancient Nano-technology: http://www.thetruthseeker.co.uk/article.asp?ID=34

These show up on many places on the internet, yet I cannot find any additional information about them to classify them either as bogus or valid.