Polo Grounds
From Tardis Wiki, the free Doctor Who reference
The Polo Grounds was the part of the Golden Gate Park in San Francisco which served as the venue for the Human Be-In, a massive celebration of American counterculture in 1967. (PROSE: Wonderland)
Behind the scenes
In the 21st century, the area is more usually called the Polo Fields. However, there is contemporary artwork from the Human Be-In which supports both Fields and Grounds as names in use in 1967 for the venue.
