You can find the plans for any venue by searching or hitting the current locationbutton once you're on site, and Google plans to continue growing its collection, with SFMOMA, The Phillips Collection, the Nelson-Atkins Museum of Art and the National WWII Museum in New Orleans set to join soon.
In the lower left is a button that brings up your current location, and in the lower right is a tiny icon that lets you switch to satellite view, to see public transit and traffic information, or to launch the separate Google Earth app.