Locals and visitors alike will always enjoy a stroll down Seattle's famous outdoor market. Pick up some local produce, eat some freshly made mini-doughnuts, buy random tacky souvenirs, watch dead fish being tossed several yards for no reason, spend an hour in line for a cup of coffee (that tastes like every other coffee) from the first ever Starbucks. Whatever you're in to. When you get thirsty, stop in at Rachel's Ginger Beer for refreshment (a particular favorite of Kitri's).
There's a lot going on in the Seattle City Center. Wander down, see the Space Needle up close, listen to some street musicians, visit the Museum of Pop Culture, eat some good food at one of the many Lower Queen Anne restaurants, take the kiddos to the Pacific Science Center, or a personal favorite, check out the Chihuly Glass Garden.
Okay... sometimes it does rain in Seattle. In case you find yourself in need of some indoor entertainment, consider the Seattle Art Museum. If you are still around on the Thursday after the wedding, the first Thursday of the month is always free admission!
Skip going to the top of the Space Needle. You'll get a better aerial view of the area from the observation deck on the 73rd floor of Columbia Tower for a third of the cost of the Space Needle. And your view will actually include the Space Needle. Or if you're on an even tighter budget, head up to the Starbucks on the 40th floor and enjoy the view for just the cost of a cup o' joe.
Feeling a little more adventurous? Not a city person? Consider a hike to the spot where Vrajesh proposed to Kitri. 9.4 miles long with 4000 ft of elevation gain, this hike is pretty grueling. But the view from the top is so so so worth it. And who knows what you will find in that mailbox once you get up there!