Hot springs and healing mud - the combination made this a perfect place for ancient baths. You can still see their remains!
More information http://www.burgasmuseums.bg/index.php?tab=home&lang=en&page=encyc&enc=poi&eid=24
Address Ветрен 8127, Bulgaria
Coordinates 42°36'41.98" N 27°23'38.591" E