Mostar is a city and municipality in Bosnia and Herzegovina, the largest and one of the most important cities in the Herzegovina region, its cultural capital and the center of the Herzegovina-Neretva Canton of the Federation. Mostar is situated on the Neretva river and is the fifth-largest city in the country. Mostar was named after the bridge keepers (natively: mostari) who in the medieval times guarded the Stari Most (Old Bridge) over the Neretva. The Old Bridge, built by the Ottomans in the 16th century, is one of Bosnia and Herzegovina's most recognizable landmarks, and is considered one of the most exemplary pieces of Islamic architecture in the Balkans
Vrelo Bune is the natural and architectural ensemble at the Buna river spring near Blagaj kasaba (village-town) and a part of the wider "Townscape ensemble of the town of Blagaj - Historical and Natural Heritage of Bosnia and Herzegovina", southeast of Mostar, Bosnia and Herzegovina. It is impossible to separate the natural values from the cultural and historical heritage of Blagaj, since its distinctive quality is in the coexistence of the natural and the man-made, in the integration of the physical structure into the landscape.