The Huntington Library is much more than a simple collection of books. It is also home to 120 acres of botanical gardens along with permanent art installations at the gallery. Visiting Huntington Library is one of the best things to do Pasadena. You can explore themed gardens like a Japanese garden, a Chinese garden, and a desert garden along with collections of bonsai, herbs, roses, lily, camellia, and palms. Different paintings representing American and European art at the gallery are wonderful. The library in itself has millions of items including photographs, prints, and 400,000 rare books.