Ireland's seaweed baths
Common in seaside towns and cities in Ireland, seaweed bathhouses allow people to soak in a tub — usually a standard bathtub like you might have in your home — filled with warm seawater and seaweed. Reportedly good for curing rheumatism, arthritis, skin conditions and even hangovers, seaweed baths have long been a staple of natural wellness in Ireland.
Some of these venues sell season tickets, so locals use the baths as well; they are not a tourist gimmick. Many of the older spas, such as Kilcullen's Seaweed Bath (established in 1912), have been around for more than 100 years and are known for their historic charm as much as for their unusual treatments.