Randers Regnskov (Randers Rainforest) is one of Denmark's most original attraction concepts: three interconnected glass domes housing tropical ecosystems built over the Gudenå river in the middle of the city. Each dome represents a different climate zone — the Americas, Africa, and Asia — with the temperature, humidity, and flora calibrated to support the animals and plants of that region.
The collection is serious rather than gimmicky. Among the highlights are a free-flying bird section, large reptiles, primates, and the tropical fish and amphibian displays that appeal to adults as much as to children. The domes are impressive in winter, when the contrast between the Danish cold outside and the tropical humidity inside is particularly striking. Allow two to three hours for a thorough visit. The zoo sits on the riverbank and is easily combined with a walk along the Gudenå.