Botanical gardens have special enclosures with controlled environmental conditions such as temperature, humidity, light etc for specific plants. These include a green house for foliage plants and a glass house for cacti and other succulent plants.
Museums have collections of preserved plant and animal specimens for study and reference.
Herbarium is a collection of plant specimens that are dried, pressed, labelled and preserved on sheets.
National parks are natural or semi-natural areas of in-situ conservation of biodiversity.