I love bookstores. I love to find books about my interests. Powell's City of Books. has books about any interest you might have. This place is huge and a common tourist attraction.
Here is some of what is on their website:
Powell's City of Books is a book lover's paradise, the largest used and new bookstore in the world. Located in downtown Portland, Oregon and occupying an entire city block, the City stocks more than a million new and used books.
Nine color coded rooms house over 3,500 different sections, offering something for every interest, including an incredible selection of out-of-print and hard-to-find titles.