Cologne’s oldest and most traditional park is the Botanical garden that is located in Riehl. The Botanical garden houses more than a 10000 species of plants. Visitors are always invited to take walks around the park and admire the exotic plants and flowers in the tropical greenhouses. The palm house gives one the feeling of being in a rainforest. The garden is a member of the European Garden Heritage Network. The yearly exhibition from January to march attracts over 70000 visitors.