Britain's only natural thermal waters, bubbling up at a constant 45 degrees beneath a city that is itself a Georgian spa set in stone. The modern Thermae complex crowns it with an open-air rooftop pool overlooking the abbey — book the last evening session, when steam rises against the floodlit towers. Pair it with the Roman Baths by day (look, don't touch) and a night in a Georgian townhouse hotel.
Featured in Ten spa and hot-spring escapes to switch off together · Romantic