Originally posted by Kamikazi
There would have to be some type of above ground markings on the surface terrain, such as moved earth, un-natural hills, and earth piles of removed dirt, some type of notice of mining or drilling, or excavation. You guys know what I mean?
Sounds like your describing the satellite picture I posted a link to above...



Kudos for you. Even if it's
not dulce, I would assume it's something major, It looks like it has an airstrip of some sort, and it's pretty well hidden. 
