Take a visit to the Market. While you're there get some Ellenos Real Greek Yogurt and Beecher's Handmade Cheese curds located right across the street. Under Pikes is the famous gum wall.
Seattle is where Starbucks was born. This location is better than the first, a must see for any Starbucks fan.
This is a 75-minute guided walking tour where you get to see and explore old Seattle, a complete city that lives underground through a series of tunnels and underground store fronts. Tickets sell out fast, so if you are interested in doing this tour while you are in town, I encourage you to book tickets in advance.
Great views of the city can be seen if you climb to the top of the hill. Fun fact: the park was featured in 10 Things I Hate About You
If you like museums or pop culture, this is the place for you.
The space needle was just renovated and can offer great views of the Pacific Northwest on a clear day.