Salvador Dalí Museum, St. Petersburg, Fla.
As designed by HOK architect Jann Weymouth, AIA, 18-inch-thick insulated reinforced concrete walls provide thermal mass for the building.
Capping the museum's atrium and café is Weymouth's irregular geodesic dome, dubbed the "Enigma."
Underneath it, the spiral stair in the atrium, inspired by strands of DNA, is supported only at the bottom and at the third level.
