Buna Wellspring) is a natural and architectural ensemble located at the spring of the Buna River near Blagaj, a village-town, and is part of the wider "Townscape ensemble of the town of Blagaj — Historical and Natural Heritage of Bosnia and Herzegovina" (featuring Ottoman Mediterranean architecture dating back to 1520), situated southeast of Mostar, Bosnia and Herzegovina.

Initially, stone-built residences were exclusive to the affluent class, but over time, even lower-class families erected numerous substantial stone houses and summer retreats.

Nestled into the natural surroundings, the musafirhana (guest house) and türbe (mausoleum) seamlessly integrate with the cliffs, Buna source, and mills, forming a unified entity.

Blagaj's architectural heritage and old urban quarters (mahalas) suggest that buildings of significant monumental and townscape value are concentrated in a relatively small area along the Buna river.

The urban structures, spatial layout, and organization trace their origins from the medieval outskirts of the fortress, which evolved during the Ottoman period into a kasaba (village-town).

Blagaj's urban design reflects both Oriental and Mediterranean influences, with the settlement's development being shaped by natural phenomena, terrain configuration, and socio-economic factors.