Spa - Belgium
The word 'spa' comes from Spa in Belguim which has been a spa for a long time.
i.e it has natural mineral water which is supposed to be good for you to drink, bathe in, etc
Spa - Latin
Spa is an acronym,
• From the Latin words 'Espa' (fountain) and 'Sparsa' (from spargere = to bubble up).
• "Sanus Per Aquam" [S P A] - meaning health by or through water.
• "Solus Per Aqua" [S P A] Latin for enter by means of water. Other interpretation: "health through water".
• “Salut Per Aqua” [S P A] Latin for health or relaxation thru water. Found in graffiti in Roman baths
Spa - International
The International Spa Association defines spas as "places devoted to enhancing overall well-being through a variety of professional services that encourage the renewal of mind, body and spirit.”