Smith Tower
When this iconic landmark opened in 1914, it was the tallest office building outside New York City and the fourth-tallest building in the world. (It remained the tallest building west of the Mississippi for nearly 50 years.) The Smith Tower Observatory on the 35th floor is an open-air wraparound deck providing panoramic views of the surrounding historic neighborhood, ball fields, the city skyline, and the mountains on clear days. It's also a superb spot to take in a sunset. The top floor includes the speakeasy-themed Observatory Bar, which features striking original architectural details and a cocktail and nibbles menu that pays homage to the Prohibition era. Smith Tower's ground-floor retail shop packed with locally made goods is also worth a visit. Can't make it to Pioneer Square? Check out Downtown's Sky View Observatory & Bar at the Columbia Center. What the sleek skyscraper lacks in vintage architectural charm, it more than makes up for with epic views.