I have imported 6.9 million data points internationally for use in my newest interactive map. Most of them are cities rivers, mountains, etc, but there are quite a few interesting man made facilities and structures.
They are classified by the following codes
http://www.geonames.org/export/codes.html
Can you guys look over the codes and make suggestions about which ones might be most useful. I am going to pare down the data a bit and I don't want to throw away data which some here might consider useful.
My favorite classification so far
TNKD
cattle dipping tank
a small artificial pond used for immersing cattle in chemically treated water for disease control. There are 153 of them in South Africa and Zimbabwe.
There are also 3 whaling stations, 80 solar salt evaporation ponds and 199 barracks listed worldwide. This database is obviously missing quite a bit of data but is certainly an interesting starting point.