Kuro5hin links to a series of articles on some stone maps that have been found in China.
Cosmiverse, Pravda and Outside Asylum have a rather interesting series of articles about some stone maps that have been found in China that may date to some 120 million years ago. The map appears to be a topographical relief map done on a scale 1 : 1.1 Kilometers. To blockquote:
The map indicates the use of civil engineering to create a system of channels about 12,000 km in length and 500 meters wide, and 12 dams that are 300-500 meters wide.
Their work is being peer reviewed in the scientific community, so there is some hope and reasonable possibility that this is not a hoax.
[via kuro5hin.org]