REMOVE

1. plants
2. fountains
3. tile (materials)
4. towers (building divisions)

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. barriers (1)
4. black-and-white film (1)
5. bushes (1)

More 

WHERE

1. Ensenada, Baja California … (1)

WHEN

1. 1949 (1)