Tortoise is one of the four celestial animals (dragon, phoenix, tiger and tortoise) in feng shui practice. Tortoises are as essential as dragons. It is the greatest sign of longevity, stability, steadiness, good fortune, support and protection. According to lillian too (the best selling author for feng shui books), tortoises are best placed in the north or at the back portion of the premise or home. They can be placed in your garden as well. Unlike limitations for the number of dragons you can own, you may own as many tortoises as you like.