Niterói Contemporary Art Museum - Rio de Janeiro, Brazil
This flying saucer building was designed by Oscar Niemeyer, with the assistance of structural engineer Bruno Contarini. It is 16 meters high and the cupola has a diameter of 50 meters. It is set on a cliff, with offering views of Guanabara Bay, Rio de Janeiro, and Sugarloaf Mountain. Completed in 1996, the modernist structure is one of the city’s main landmarks.