Have you been to the Yerba Buena in SF?
This waterfall is located in the Yerba Buena gardens. Behind the waterfall is the memorial for Martin Luther King Jr. And across the street is the SF Museum of Modern Arts.
Also nearby is the Moscone Center where many conventions and conferences take place. This weekend the dental convention is in town. And I usually take a day or two to listen to lectures and browse the exhibits to learn about new products.