Rhye's terrain graphics for Civilization III
Based on Sn00py's, this modpack turns the standard yellowish graphics (left screenshot) into a kind of satellite view (right screenshot).
The main diffenreces are:
Land is darker and has less saturation
Mountain chains instead of single mountains
Modified delta rivers
A different "bonus" grassland
Some smaller resources
No more "jungle trees on water" effect
New desert irrigations
Flood plains, irrigation, pollution, ruins, goody huts and volcanos caps made by other users
However, if you really want something different, you can try the Underworld terrain!