Tutorials/Underwater home

An undersea home has certain pros and cons that set it apart from any other bases or homes. Firstly, an underwater home is immune to any explosions, is difficult to access by Mobs, and can provide excellent visual range and protection. However, an undersea fort can be somewhat time-consuming to build, enter, and exit. Follow these directions and you will have an excellent undersea fortress.

Step One
To begin, find a fairly deep spring or lake.

Step Two
Using any Block (e.g. Dirt or Glass), construct any size column equal to or larger than a 3x3 column from the sea-floor to the surface. Dig a hole by the side of the column and than go up through the center, as this will be your entrance.

Step Three
Further construct the exit and or any other features of the dome to your hearts content.

Step Four
Repeat step three as many times as desired. Note that if there is soil on the ground, it will be very fertile, so make crops if desired. if you dome is larger than 7 blocks high and 6 blocks wide than you can plant trees.

Video Tutorial
http://www.youtube.com/watch?v=2cnOm6K0Ekg&feature=related