Arasan is a huge bath complex or locals call it "Banya Arasan".
Everything inside is gender-segregated and most people are naked. It has pools, different saunas, spa treatments, massages, manicures, and places to eat.

You can wear a swimsuit if you want (even just the bottoms), but you’ll need a sarong or wrap when walking around and it’s required for the restaurant, which is also separated by gender.

Usually women beat each other with leafy branches called Veniks. You should try it, it is one of a kind experience. Inside sauna better to cover your hair with a special hat and avoid the damage and dizziness.