Or there may be an exhibit where you push a button to hear the sound of an animal. Some large nature centers may have a greenhouse or perhaps a butterfly garden. There may be a class in such things as bird watching or rock and fossil identification. Reading can satify curiousity as well as stimulate interest in nature. Libraries typically have books, magazines and vcr tapes providing much information on nature.
Television documentaries can be particularly enjoyable.
Take notice of the aspects of nature around you. Even in cities, plants and animals occupy whatever space is available and suits their needs.