The Roof Terrace at One Kearny shows why we're lucky that San Francisco requires downtown developers to provide space in their projects that is accessible to the public at large. [...]
But the only exterior hint that the terrace exists is a see-through sign etched into the glass at knee level by the front door. Once inside, a guard requires you to sign in before going farther.
Presumably it is also behind a door marked "BEWARE OF THE LEOPARD".