Unalome tattoos are usually placed on the sternum, respiratory center, or visible parts of the body, such as hands / fingers, throat, and even face. It's a mysterious symbol that has been around for many years. Generally speaking, unalome is a spiritual symbol related to Theravada Buddhism, similar to bin Du in Sanskrit and Tigli in Tibetan.
Unalome is a symbol of Buddhism and is often described as a sign of the road to enlightenment. Since the concept of enlightenment is a very abstract concept in the west, I usually say it is a symbol of the road from separation to wholeness. The symbol begins at the center of the spiral; this symbolizes the birth of our entry into the earth.