Momina Banya is one of Hisarya's mineral-spring parks, centred on a public drinking fountain whose name means "maiden's bath." The park around it is simple, with paths, a playground, outdoor exercise equipment, and a bust of Vasil Levski.
It is a low-key stop, but it fits Hisarya's character well. Come while walking between the town's Roman remains and mineral-water springs, and bring a bottle if you want to taste the water.