"Bathing in beer and consuming the beverage has long been used in Czech folk medicine," says Tereza of the Bernard Beer Spa.
"Our grandmothers and great-grandmothers recommended using brewer's yeast for many ailments."
Technically I wasn't bathing in suds from a tap because beer gets sticky when it's heated. But I was bathing in the ingredients used to make the best Czech lager while gulping down the nectar of Valhalla.
This made me wonder about the paradox of detoxifying my body while getting intoxicated. But I could not think of a better way to end an day of exploring this city's medieval and Baroque architecture.
It also set me up perfectly for a dinner of Czech-style tapas.
The flavours are smoky, sour and savoury with an occasional morsel of delicious animal fat to help stimulate beer consumption.
My favourite is probably Olomoucke syrecky, donut-shaped slices of ripe, pungent cheese much loved by the Austrian Emperor Rudolf II - a sorcerer who spent most of his life trying to uncover the secret of the Philosopher's Stone.
A close second is Matjes herring fillets. These tender strips of Norwegian herring marinated in oil and crowned with freshly chopped onions melt in your mouth.
Other Czech tapas classics include pickled sausages known as utopenci (drowned men), nakladany hermelin, a marinated camembert type cheese served with a sprinkling of fresh onion and paprika, and hog's head cheese.
Everything is accompanied by fresh Czech sourdough rye bread and washed down with Pilsner Urquell, the world's original golden lager brewed in Plzen since 1842. Any beer using pilsner in its name is a faded copy of this Sistine Chapel of beers.
So when in the City of a Thousand Spires, visit the Bernard Beer Spa, chill out with some Czech lager - and knock on Heaven's Gate.
CHECKLIST
Getting there: Air New Zealand flies daily to London, from where a range of budget airlines connect to Prague.