Madison Avenue and 75th Street

There are a couple of nice exhibits currently going on at the Whitney Museum: Georgia O’Keeffe’s early abstract work (including pieces from when she lived in Columbia, SC, and New York) and two floors devoted to Roni Horn (who has some really thrilling pieces, such as the paired photographs of the back of birds’ heads and the photographs of water with footnotes embedded, and some really boring pieces, such as the steel ball on the floor).