Ключевые слова: america, american, animal, attraction, biologic, biology, conservation, culture, dc, destination, elephant, environment, exhibit, exhibition, famous, hall, history, holiday, indoor, institution, interior, investigation, landmark, mammal, museum, national, national museum of natural history, natural, nature, people, person, preservation, protection, research, science, scientific, smithsonian, states, tourism, tourist, united, us, usa, vacation, visitor, washington,