LLLI - Fictional Liberland airstrip, airport and city

A fictional airport on Siga island, an area on the Serbian-Croatian border but not claimed by either, as Croatia recognizes the border as the original course of the river Danube when the provincial borders in the Austro-Hungarian empire were drawn, while the Serbian government believes the border should always follow the current course of the Danube. A Czech man called Vít Jedlička claimed the land as the free republic of Liberland. It is not recognized by any other countries officially.