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".

Maribor is the second-largest city in Slovenia with about 95,500 inhabitants, it's also the largest city of the traditional region of Lower Styria and the seat of the City Municipality of Maribor.

Maribor was first mentioned as a market near the castle Castrum Marchburch ("March Castle") in 1204, and received town privileges in 1254. It began to grow rapidly after the victory of Rudolf I of the Habsburg dynasty over King Otakar II of Bohemia in 1278. Maribor withstood sieges by Matthias Corvinus in 1480/1481 and by the Ottoman Empire in 1532 and 1683.

Maribor has a humid continental climate, bordering on oceanic climate. Average temperatures hover around zero degrees Celsius during the winter. Summers are generally warm. Average temperatures during the city's warmest month (July) exceed 20 degrees Celsius, which is one of the main reasons for the Maribor wine tradition.

Many historical structures stand in Maribor. Of the remains of city walls surrounding the old downtown, the most prominent are the Judgement Tower, the Water Tower, and the Jewish Tower. Maribor Cathedral was built in the Gothic style in the 13th century. Maribor Synagogue was built in the 14th century, and is the second oldest synagogue of Europe. Today it serves as a centre for cultural activities. Other prominent Medieval buildings are Maribor Castle, Betnava Castle, and the ruins of Upper Maribor Castle on Pyramid Hill. Town Hall was constructed in the Renaissance style, and the Plague Column in the Baroque style.

The city hosts the University of Maribor, established in 1975, and many other schools.

Every June, the two-week Lent Festival (named after the waterfront district called Lent) is held, with hundreds of musical, theatrical and other events. Every year the festival attracts theatre, opera, ballet performers, classical, modern, and jazz musicians and dancers from all over the world, and of course many visitors. There is also mime, magic shows are being held and acrobats perform during the festival.

Maribor is known for wine and culinary specialities of international and Slovene. There are also many popular restaurants with Serbian cuisine. The Vinag Wine Cellar (Vinagova vinska klet), with the area of 20.000 m2 and the length of 2 kilometres, keeps 5,5 millions litres of wine. The house of the oldest grapevine in the world (Hiša stare trte) at Lent grows the world's oldest grapevine, which was in 2004 recorded in Guinness World Records. The grapevine of Žametovka is about 440 years old.