Thomas Gilcrease's museum of American West art on around 460 acres of Osage foothills in Tulsa, with themed historic gardens on the grounds.
Opened 1997 in downtown Santa Fe, a museum devoted to Georgia O'Keeffe, in adobe-form buildings with a small courtyard and intimate galleries.
Founded in 1807, one of the oldest independent libraries in the United States, in an 1849 building on Beacon Street beside the State House. Books, busts and balconies.
A converted shoe warehouse in downtown St. Louis filled with salvaged architectural fragments, caves, tunnels, a ten-storey slide and a rooftop.
Founded 1882, Maine's oldest public art institution, with the 1983 Charles Shipman Payson Building designed by Henry Cobb of I. M. Pei & Partners.
Opened 1931 in Omaha, an Art Deco museum clad inside and out in Georgia pink marble, with a fountain court at its centre and a 1994 Foster pavilion alongside.
Waite Phillips' 1927 Italian Renaissance villa in Tulsa, now an art museum, with around 25 acres of formal gardens running down to a tempietto.
Baltimore's 1888 Victorian conservatory in Druid Hill Park — a glass palm house with linked growing houses. Green, humid, and lit entirely through glass.
Opened 1878, the Peabody's stack room rises five tiers of cast-iron balconies to a skylight sixty feet above. One of the great interiors in America.
Isabella Stewart Gardner's 1903 Venetian palace in the Fenway, built around a glass-roofed courtyard. One of the most beautiful and most restricted interiors in Boston.