The term 'Capital Spanning the Danube' is referring to the city of BUDAPEST, which is the capital of Hungary and is located on both sides of the Danube River. BUDAPEST is the 8th largest city in the European Union and is known for its rich culture and history. It is a popular tourist destination and is home to many world-renowned attractions, such as the Buda Castle, the Chain Bridge, and the Szechenyi Thermal Bath.