According to the book "Die begrängte Großmacht, Österreich-Ungarn und das europäische Mächtesystem 1866/67-1914" by Konrad Canis there was a proposal by Austrian businessmen to purchase the colony of Rio de Oro (most of modern Western Sahara) from Spain back in 1899, just a year after the Spanish-American War. Spanish control over the colony was limited and according to contemporary observers it was mismanaged, so these Austrian businessmen saw an opportunity to properly exploit the small West African colony by expanding fisheries, genuine attempts at agriculture, and by using it as a coaling station for Austrian goods going overseas. Supposedly an agreement was made between this group of businessmen and the cash-starved Spanish government, but the Hungarian side of the dual monarchy blocked the acquisition of the colony. But what if the purchase had happened? It would've provided Austria-Hungary with a small colony of their own (ignoring their concession at Tianjin, which it only gained in 1902 anyway), even if it wasn't "prime real estate". In the event of Austria(-Hungary) keeping their small colony throughout the years, the resulting nation would undoubtedly be a fascinating place to behold.