Helen Frankenthaler’s first professionally exhibited work—and her most famous—was Mountains and Sea (1952), a soak-stain painting she completed after a road trip. Frankenthaler had been to Cape Breton Island, at the northern tip of Nova Scotia, and its rugged beauty stuck with her. Though the painting is abstract, elements of the sea and coastline emerge amid strokes of blue and areas of mottled green. It was this painting that inaugurated the shift from Abstract Expressionism to Color Field painting, paving the way for another dynasty of New York artists. In this selection of 20 works, completed between 1990 and 2003, Frankenthaler’s interest in the relationship between landscape and abstraction is explored. —Elena Clavarino