If you have hammock which is equipped with steel stand, then you do not need any trees to install it. If your hammock has no steel stand with it, plus you cannot any find perfect tress to hang it, then you should set it up with no trees. Besides trees, you can set this hammock between two pillars or neighboring buildings. You can also install it between jeeps if you can provide it. In addition, provide two strong poles installed to the soil to hang up this hammock. If you use it for indoors, you can hang your hammock in the room corner using some tools.