Banja Luka is the largest city of the Republika Srpska entity and second largest city in Bosnia and Herzegovina after the capital Sarajevo. The city lies on the River Vrbas and is well known in the countries of the former Yugoslavia for being full of tree-lined avenues, boulevards, gardens, and parks. According to the 2013 census the City of Banja Luka, has 185,042 inhabitants.

Banja Luka has a moderate humid subtropical climate which borders a humid continental climate, with cold winters and warm summers. The warmest month of the year is July, with an average temperature of 21.3 °C. The coldest month of the year is January, when temperatures average near freezing at 0.8 °C.

Due to its long history, Banja Luka is rich in culture. There are several museums including the Museum of Bosanska Krajina, the Ethnographic Museum established in 1930, and the Museum of Modern Art of Republika Srpska which is also called MSURS the Museum of Contemporary Art. Banja Luka is also the home of the national theatre and library, both dating from the first half of the 20th century, and of numerous other theatres. The headquarters of the Archives of Republika Srpska is situated in the building known as Carska kuća or Imperial House, build around 1880. It has been in continuous public use longer than any other structure in Banja Luka.

The natural beauties of the surrounding area guarantee the city of Banja Luka a good position in tourism. he city and surrounding area boast a number of popular tourist attractions. Among the most famous are the pools, thermal springs, and spas in the region. Due to its parks and over 10 000 trees Banja Luka was once nicknamed the "Green City".

Nikšić is the second largest city of Montenegro, with a total population of 71,237, located in the west of the country, in the centre of the spacious Nikšić field at the foot of Mount Trebjesa.

It is the center of Nikšić Municipality (Population of 87,950), which is the largest municipality by area and second most inhabited after Podgorica. It is an important industrial, cultural, and educational center.

Nikšić has a humid subtropical climate, which is influenced by the Mediterranean climate drying trend during summer. Average temperature for January is 1.3°C, while average temperature in July is 21.1°C. Average humidity amounts to 68,57%. Nikšić receives 2.245 hours of sunshine per year, with warm and moderately wet summers, and cool and rainy winters. On average, there are 19 days per year with snowfall.

Although Nikšić area has seen human settlements since antiquity, most of the modern Nikšić is a planned city. Very little remains of the Ottoman architectural heritage, despite the long presence of Ottoman Empire in the area. The city layout visible today still follows the 1883 urban plan commissioned by King Nicholas and designed by Croatian architect Josip Slade.

According to this plan, the streets of Nikšić radiate to the north and east from the central city square (today a roundabout), locally known as Skver. The radial streets are intersected by circumferential streets and avenues, thus creating a half-spider web-like street layout.

Nikšić is, alongside Podgorica, one of the biggest industrial centres of Montenegro. A Steel mill (Nikšićka Željezara), bauxite mine, Trebjesa brewery (Nikšićka Pivara), and many more are concentrated in this city. These big industries had struggled to survive the collapse of the socialist economy, but have since recovered. The process of privatization is either finished or still in progress for some of these industries.

Today those industry giants cannot employ as many workers as they could back in the days of Socialist Federal Republic of Yugoslavia, and the economy of Nikšić is slowly transforming into one that is more service-oriented. In 1981 Niksic's GDP per capita was 91% of the Yugoslav average.

Although mostly perceived as an industrial center, Nikšić is also a city of rich cultural heritage. The most significant cultural institution in the city is Centar Za Kulturu (Cultural Center), which incorporates the city's major public cultural establishments. Nikšić is known for its distinctive cultural atmosphere and bohemian art scene, with poet Vitomir Nikolić and singers/songwriters like Miladin Šobić or Marinko Pavićević as prominent representatives of the Nikšić bohemian spirit. Živko Nikolić, a native of Nikšić, is considered the most significant Montenegrin movie director.