Kadiköy is a central district of 25 square kilometres in southwestern Istanbul, bordered by the Marmara Sea. It is primarily a residential and commercial area with a sizable elderly population and simultaneous rapid urban growth. The municipality is also home to several universities and has a sizable student population. Thus, Kadiköy places great importance on inclusive urban development – particularly to expand its social spaces through participatory means. It is seen as a leading example among Turkish local governments in the fight against climate change.

Liepāja is the third largest city in south-west of Latvia, located between the Baltic Sea and “Natura 2000” protected Lake Liepāja. It has become a modern city that combines the world scope with the conveniences typical of a small city. Liepāja is rich in cultural, artistic and sports traditions. It is a popular tourist destination with its unique attractions in the former military area of Karosta, the city centre full of cultural and architectural pearls, and it is fascinated by the wide beach, with the unusually white and fine sand. The most developed business sectors in the city are metalworking, textile industry, production of construction materials and food, shipbuilding and cargo transportation as Liepaja is the port city.

Szombathely is the capital city of Hungary’s Vas County, located near the Austrian border. It is a historical commercial and cultural focal point in the cross-border area. In line with the automotive industry as a key Hungarian economic driver, Szombathely’s main industrial actors are automobile manufacturers’ suppliers. However, the city also aims to reduce its car dependency, together with various other sustainability commitments. In recognition, Szombathely was recently awarded the Hungarian Association of Climate-Friendly Municipalities’ Green Infrastructure Development Award. Enjoying a high number of civil society organisations, Szombathely adopts a bottom-up, co-creation approach to urban development, prioritizing citizen engagement to shape the city's future. The city emphasizes collaboration, transparency, and sustainability, focusing on initiatives like promoting alternative transportation, digitalisation, creating communal spaces, and advancing a circular economy.

Zagreb, Croatia's vibrant capital, seamlessly blends urban energy with a welcoming community spirit. Rich in history and culture, the city captivates residents, tourists, and business partners alike with its lush parks, scenic lakes, and charming squares. Zagreb is committed to enhancing the quality of life for its residents with comprehensive social policies that ensure security and improved living standards for people with disabilities, retirees, children, families, and students. Nestled under Sljeme's slopes and along the Sava River, Zagreb integrates conservation strategies with a robust heritage that dates to Roman times and thrives as a consolidated city-county with 17 diverse districts.