Columbia subject headings:
Harvard subject headings:
Amusement parks--Pictorial works.
Aquatic sports facilities--Pictorial works.
Architecture, Modern--20th century--Pictorial works.
Landscape architecture--Pictorial works
Public aquariums--Pictorial works.
Zoos--Pictorial works.
Princeton subject headings:
Amusement parks--Pictorial works.
Aquatic sports facilities--Pictorial works.
Architecture, Modern--20th century--Pictorial works.
Landscape architecture--Pictorial works.
Public aquariums--Pictorial works.
Zoos--Pictorial works.