Mostar is situated on the Neretva River and is the fifth-largest city in the country. Mostar was named after the bridge keepers (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. Blagaj is a village-town in the south-eastern region of the Mostar basin, in the HerzegovinaNeretva Canton of Bosnia and Herzegovina. It stands at the edge of Bišće plain and is one of the most valuable mixed urban and rural structures in Bosnia and Herzegovina,
distinguished from other similar structures in its urban layout. The Blagaj Tekija was built around 1520, with elements of Ottoman architecture and Mediterranean style and is considered a national monument. Blagaj Tekke is a monastery built for the Dervish cults.