The Farnsworth House, an icon of 20th century modern architecture in Plano, Ill., was designed and constructed by Ludwig Mies van der Rohe between 1945-51.
Fallingwater, located 50 miles southeast of Pittsburgh, was designed by Frank Lloyd Wright in 1935. The home was built partly over a waterfall and named the "best all-time work of American architecture" by American Institute of Architects. It's also listed among Smithsonian's Life List of 28 places "to visit before you die."
The Gropius House was once the family residence of noted architect Walter Gropius. Gropius was founder of the Bauhaus and one of the most influential architects of the 20th century.
The Miller House, in Columbus, Ind., was designed by Eero Saarinen and built in 1957, it was the home of J. Irwin Miller.
Neutra VDL, in Los Angeles, was designed by Richard Neutra and his son Dion Neutra. It gets it name from a patron of Neutra's, who gave him a loan to built the structure: Case H. Van der Leeuw (VDL), a wealthy Dutch industrialist and architecture aficionado. It is now maintained by Cal Poly Pomona's College of Environmental Design.
Taliesin West was architect Frank Lloyd Wright's winter home and school in the desert from 1937 until his death in 1959 at the age of 91.
Mexico City house and studio of Luis Barragán, considered by many to be the foremost Mexican architect of the 20th century, was built in 1948. The house was listed as a UNESCO World Heritage site in 2004 and is now a museum.
The Glass House, built in 1949 in New Canaan, Conn., was designed by Philip Johnson as his residence. It is widely considered to be a masterpiece in the use of glass.
Sunnylands is formerly the winter residence of Walter and Leonore Annenberg, the TV Guide publishing magnate.
The Eames House was built in 1949 by husband-and-wife design pioneers Charles and Ray Eames, to serve as their home and studio.
Luckily, some of the best examples of modern architecture can be studied, up close and in person. Many of these design wonders are in the U.S., have protective status from their listing on the National Register of Historic Place, and are open to the public. All of them are not to be missed.