Looking for a unique (and free!) activity in Seattle? Consider paying a visit to Seattle Central Library. Seattle Central Library is a public library in the heart of downtown Seattle that features some stunning architecture. The building, which is constructed largely out of glass and steel, has a very geometric and striking appearance, giving you plenty of great photo opps. The library is also massive with 11 stories and capacity to hold over 1 million books. Seattle Central Library is well-known for its unique architecture and is visited by millions of people every year. I love wandering around the library and people-watching on a rainy day, and I highly recommend a visit if you’ve never been.