The Huntington Library and surrounding 120 acres of grounds are a education and research collection established in 1919 by Henry & Arabella Huntington. The main Art Gallery is located in the former residence of the Huntingtons with an extensive collection of European and American art. The surrounding grounds support a variety of botanical gardens including the Chinese, Japanese, and Desert gardens as well as the Rose Hills Foundation Conservatory. The extensive and varied grounds located within the Studio Zone make the Huntington extremely popular with film productions.
Source: I Am Not a Stalker
The gazebo was erected for the film, but the gardens they walk through are a permanent feature. The Huntington Gallery is used for the exterior of the building the dance is held.
Source: I Am Not a Stalker
From episode 3x05 "Shooting Star/American in Paris".
Source: I Am Not a Stalker
Source: I Am Not a Stalker
Source: IMDb
Used for the scene where a young River is in class.
Source: I Am Not a Stalker
Source: I Am Not a Stalker
Source: I Am Not a Stalker
Source: IMDb
Source: IMDb