Osogbo is 295 times larger than University Botanical Garden (Oslo).
Area: 46 km2 calculated
Osogbo is a city in Nigeria, the capital of Osun State. Osogbo city seats the Headquarters of both Osogbo Local Government Area and Olorunda Local Government Area. It is some 88 kilometers by road Northeast of Ibadan. Wikipedia
Area: 0 km2 calculated
The University Botanical Garden at Tøyen in Oslo is Norway's oldest botanical garden, established in 1814. It is administrated by the University of Oslo. The University of Oslo's oldest building, the Tøyen Manor which was given as a gift in 1812, is located in the garden. Wikipedia