drink in the Oak Room of the Plaza Hotel. It is here that he is kidnapped by Vandamm's henchmen. Thornhill later returns to the Plaza, where he breaks into George Kaplan's room. For space reasons, most of the shots in and around the Oak Room were actually done on a set. Old Westbury Gardens (71 Old Westbury Road, Old Westbury) Thornhill's kidnappers drive him to Townsend's estate on Long Island. After questioning Thornhill, Vandamm instructs Leonard and his other henchmen to intoxicate Thornhill by force. United Nations Headquarters Following Thornhill's escape from Vandamm's henchmen at the Plaza, he takes a taxi to the United Nations Headquarters to meet Lester Townsend. The U.N. Headquarters buildings were also designed by Harrison and Abramovitz, the architects of Thornhill's office. The scene of Cary Grant going to the United Nations in New York was filmed illicitly because, after reviewing the script, U.N. authorities denied permission to film on or near its property. After two failed attempts to get the required shots, Hitchcock had Grant pull up in a taxicab right outside the General Assembly Building while a hidden camera crew filmed him exiting the vehicle and walking across the plaza. Grand Central Terminal (89 East 42nd Street, New York) Following the murder of Townsend at the United Nations, Thornhill rushes to Grand Central Terminal, where he sneaks onto the 20th Century Limited en route to Chicago. LaSalle Street Station (414 South LaSalle Street, Chicago) Thornhill and Eve Kendall arrive in Chicago at the LaSalle Street Station. At the station, Kendall gives Thornhill the instructions for his meeting with Kaplan. Prairie Stop The famous "crop duster scene," which in the film takes place in rural Indiana, was in actuality filmed on a highway in central California near the town Wasco. Hitchcock added square signs to the location to replicate those found in Indiana. Ambassador East Hotel Thornhill returns to Chicago in a stolen truck he parks outside the Ambassador East Hotel. The hotel opened in 1926 and was designed by Robert S. DeGolyer and Co. Today, it continues to be operated as a hotel, under the name The Ambassador. Chicago Midway Airport Following Thornhill's arrest at the auction, he and the Professor travel to Midway Airport, where they board a flight for Rapid City, South Dakota. The terminal seen in the film was built in 1945-46 and was designed by architect Paul Gerhardt Sr. This