The Huntington Library - 2 Guest Passes for the Library, Art Collection and Botanical Gardens. 

A private, nonprofit institution, The Huntington was founded in 1919 by Henry E. Huntington, an exceptional business leader and a man of vision. During his lifetime, Huntington amassed the core of one of the finest research libraries in the world, established an impressive art collection, and created an array of botanical gardens with plants from around the globe.

Link to The Huntington Library website.