If you haven't been in a while, it's time to go!  The architecture of the museum itself might be the most compelling art there.

Solomon Guggenheim was an enthusiatic art collector in NY in the 1930s and his collection quickly outgrew his apartment. In 1943, Frank Lloyd Wright was commissioned to design a permanent structure for the collection. It took Wright 15 years, 700 sketches, and six sets of working drawings to create the museum. The Museum opened in 1959, ten years after the death of Solomon Guggenheim and six months after the death of Frank Lloyd Wright. Wright remarked with glee that his museum would make the nearby Metropolitan Museum of Art "look like a Protestant barn." The distinctive building, Wright's last major work, instantly polarized architecture critics upon completion, though today it is an icon and a National Historic Landmark.

Sources: Wikipedia and Guggenheim Museum.

Insulation 

The kitchen featured this month used UltraTouch recycled denim insulation.  It's formaldehyde-free, so offgassing isn't an issue. The cotton fibers are treated with an EPA-registered fungal inhibitor that offers excellent protection from mold, mildew, fungus and pests, and provides outstanding fire-resistance.

Another smart choice is cellulose insulation made of 80-85% post-consumer recycled newsprint. The fiber is chemically treated with non-toxic borate compounds to resist fire, insects and mold.  It can be installed between the studs when the walls are open or blown into small cut out holes in existing walls. 

The typical fiberglass insulation is effective yet problematic.  Side effects of contact with fiberglass include skin, eye and respiratory irritation, and worse, the toxic chemical formaldehyde (known to slowly off-gas from the insulation over many years) is used to bind the fibers together.  The National Toxicology Program issued a report in June 2011 listing formaldehyde (also found in standard plywood and products used by nail & hair salons) as a carcinogen.  Installation requires long sleeves, gloves and a mask.  That tells me something about how safe this is!