Tattooing has been practiced for centuries worldwide.In every society you can definetely see tattooing.
Tattoos have served as rites of passage, marks of status and rank, symbols of religious and spiritual devotion, decorations for bravery, sexual lures and marks of fertility, pledges of love, punishment, amulets and talismans, protection, and as the marks of outcasts, slaves and convicts. The symbolism and impact of tattoos varies in different places and cultures.(Wiki)

You can find thousands of tattoo designs over internet but there are some tattoo designs which stands out the crowd.And 3D tattoo designs are good examples for this.