For crying out loud: Yes, in Baden, bathing is allowed.
Heisse Brunnen, Baden, Switzerland

For crying out loud: Yes, in Baden, bathing is allowed.
Just one of many thermal water fueled camping grounds along the border between Hungary and Romania.
Last year we found a free thermal bath on the Danube near Hârșova in Romania. This seems to be the Bulgarian counterpart albeit a few hundred kilometers upstream.
A mesothermal spring in a lush green valley outside the major roman spa town just below the Balkan mountain range.
Топилцата or “the Smelter” is the peoples answer to the city of spa hotels.
Cool off in snowmelt river water after extra hot mineral bath.
Everybody on the island knows the rocky beach with an abandoned spa building. But do you dare bath in the winter?
EU Money well spend: gentle outdoor pools in the Rhodope Mountains.
The cities beach promenade with hot pool by the Black Sea!
Right at the bank of the Danube river: “The stinky baths”!
Two more 35ºC soaks just a splash away from Thermopilae!
A soak just as legendary as the ‘300’ Spartans having fought here 2500 years ago.
Bunch of warm pools next to the highway.
Swimming with turtles!
The low key alternative 20km from Loutra Edipsou!
This hotspring town has freeloaders covered with outdoor pools at the shore.
Radioactivity is in the water for you and me!
Time for some ancient hydrotherapy!
Just one of 5 hot springs in the bay of Therma: This is the free open air coastal cave!
Hefty amounts of hot water rushing into the Aegean sea between round boulders!
Why not spend your time in a hotspring as you wait for your flight!
A chapel on the cliff gives the name to this long forgotten seaside hotspring!
Maybe not the often touted “hottest spring in Europe” but Polichintos has plenty of water and hot it is indeed!
As tradition wants it, we went on our winter thermal spring heist. Which would lead us this time to a place in Hungary, four spots in Romania, six in Bulgaria and many more in Greece: located in the northern mainland (Thrace), Lamia and the islands of Evia, Samothraki, Lesbos, Ikaria and Kos. There is a recap of each place and some thermal photography to go along with it. Here are all of them in order by my personal dip rating.
Abundant hot water in the shepherds wasteland left neglected!
Fancy outdoor thermal pools with Turkish baths!
Scalding water between pebbles on the beach!
Ottoman hotel in shambles, spa is vacated but the hotspring still flowing as ever!
Aging Turkish spa under clandestine reactivation!
Free hotsprings under wings of the headless nike!
The random roadside hotspring!
Literary the fountain of freedom!
Hotsprings and home of a modern day prophetess!
Brutalist spa town with open air hotsprings!
Spa town with roman roots and hotsprings!
A campground with hotspring pools!
Recommended: Spend half a year quarantined on the island so you can explore the entire island and know all the best hot springs, hikes and beaches! If you have less time this list will help you to pick some natural highlights.