• Warm, humid greenhouses sit at 15-25°C, so leave coats on the racks or in the lockers behind the ticket desk
• Strollers are allowed, but the greenhouse corridors are too narrow for double strollers; there is a changing room and an accessible toilet
• Hands off the plants, since the collection includes toxic plants and some that irritate skin

A botanic garden of the University of Helsinki, here since 1829. Its 10 greenhouses run from desert to rainforest to tropical wetland, with giant Santa Cruz water lilies, banana trees, flowering cacti and carnivorous plants. In the Palm House, a path through plant evolution leads to the world's biggest seed.

The outdoor garden has ponds, a garden of the senses to smell and touch, and Finland's first rock garden.