The botanical garden is a wonderful place to visit and learn about the diversity of the plant world. The pyramid-shaped greenhouses provide tropical heat around the year, and the outdoor gardens showcase a variety of trees and bushes as well as useful and ornamental plants. Greenhouses Romeo and Julia house about 1 200 plant species from the different climate regions of the world. In the outdoor garden, you can find more than 4 000 plants native to the northern climate. There is a voluntary entrance fee to the greenhouses. 

http://oulu.fi/en/university/botanical-garden