Time for some Minecraft!
My lovely base. On the left, my tree fortress with a waterfall. In the middle, a fortified outhouse with sufficient lighting to make animals spawn there. And on the right, a lovely warm lava flow covering my main hall front window.
My little submarine den with farming capabilities. I had a boat but I crashed it into the pier and it blew up. Didn't bother myself to build a second one.
My main hall, you can see that the lava flow doesn't cover the window completely. I still need another bucket to make it perfect.
Road to my basement where my current mine is operational.
2nd Floor lookout window.
Watchtower.
The top of my base.
The base is completely sealed off, and the only way in or out is through the submarine den or through the waterfall. The base is also completely self sufficient: minerals come from the mine, wood from the top and food from the farm and animals that spawn inside or at the top.