Tunick started out in 1992 photographing nudes on the streets of New York. His photos quickly became popular and he spread out to other states in America. Tunick went international and has taken photos in cities that include London, Melbourne, Montreal, Sao Paulo and Vienna.
In June 2003 he completed his largest photo by photographing 7000 Spaniards in Barcelona.
His models are volunteers who only receive a signed photo as a reward.