Piri Reis

http://en.wikipedia.org/wiki/Piri_Reis_map

"... the claim that the map depicts a portion of the ancient Antarctican landmass has certain criticisms. Firstly, the map is large-scale and low-detail, and the landmass pictured is arguably not accurate enough to be matched to any actual landscape.

Secondly, any similarity it may have to modern radar imaging of the Antarctica under the ice may be irrelevant, since in the period when Antarctica was not covered with an ice cap its shorelines may be so different as to be completely unrecognizable, due to the pre-icecap sea level being significantly higher, and thus obscuring a great portion of the sixth continent.

Thirdly, for it to be Antartica one would have to explain why the South American east coast ends at the mouth of the Amazon. Clearly it does not, the landmass depicted is just the continuation of the coast and includes features of Tierra del Fuego and the Malvinas/Falklands."

For what that's worth.....