How to choose the best location for castle, fort or home

Whether choosing a location for a Dojo, Castle, or House the following rules should be observed. Turtle Snake to the North Blue dragon to the East Red Sparrow to the South White Tiger to the West

The Emperors castle in Tokyo and almost all of the important buildings in Japan were built according to this poem.

The poem translates as meaning, You should have mountains to the North Running water to the East A broard open expanse to the South And a large road to the West