Butterflies at the Vliet (Vlinders aan de Vliet) Vlinders aan de Vliet is a tropical indoor butterfly jungle zoo located in a spacious 1600m2 greenhouse in Leidschendam, close to The Hague, The Netherlands. Vlinders aan de Vliet is a charming tropical zoo located. It features a vibrant collection of colorful butterflies, birds, fish, tortoises, reptiles, and a variety of unique insects. Open from spring to autumn, this delightful spot offers a chance to discover the fascinating world of butterflies and the mysteries of the tropical jungle. It's a perfect destination for a family outing, especially on rainy days, as it transports you straight to a tropical paradise.