Outside the U.S. Gallery
I just couldn't set up this one up without
Tanks over in Russia
Here's their main photo page
http://www.paintball.ru/photo.html
The galleries with tanks are the 3rd, 4th and 5th from the bottom
I don't know what this one is based on but I like it!
Crossfire paintball tank in Ireland. 
Safari Ridge tank in British Columbia Canada 
The Bigfoot tank 
up in Quebec Canada