In the mid-1800's, Dr. Feliks Boczkowski noticed that the miners working inside salt-lined caves had significantly lower cases of lung disease - and hence a new spa treatment was born! In South Korea, only the blind or visually impaired may become licensed masseurs. Massage therapy for athletes was first televised at the 1984 Olympics in Los Angeles. Sunless tanning is expected to continue growing significantly over the next 5 years. Check out these spa & tanning franchises for sale.