Right y o, iv got some info, from a site..."http://www.helium.com/items/840331-portland-rather-large-island" im not going to LINK to it, but this ISNT my writing, so i had to display the site here somwhere.
To me the most fascinating parts of Portland, Forbidden City so named by the locals was an area of Portland forbidden to any non military persons. Here in a massive complex of buildings both the Army and Navy would play wargames. Huge military battles were fought here while training for events such as the Falklands. Set up like a town; Forbidden City had office blocks, houses and shops as well as a massive radio station on the hill. It's still forbidden to enter but the locals sneak over for a look, now that all military force has been removed from the island. It's a scary risk though, as its claimed that over 100 experimental land mines remain in the area over 2 miles in radius. The buildings are slowly being removed which is sad if properly maintained this would make for a fascinating tourist attraction, kids in the state its already in just love it.
Again, that was not my info...