Tsuru Aoki (Ume-Ko) and Sessue Hayakawa (Tatsu) were married in real life.
Though it would be more poetically satisfying for the waterfall featured in the film to be Bridalveil Falls, considering Tatsu's mad search for his fanciful abducted princess wife, the actual location is more likely Vernal Fall in Yosemite National Park, which falls into the Merced River and is consistent with Tatsu's vantage point and actions in the movie.
The final scene of the movie shows Tatsu and Ume-Ko on location at Yosemite's Artist Point.