City Sightseeing Seattle - Must See Seattle, Seattle

City Sightseeing opens up Seattle to eager tourists, regardless of whether they're a lifelong resident of the Emerald City or a first-time visitor. With their signature double-decker, open-top tour buses, the guides here give tours full of fun facts and historical gems. But it's not a passive tour. Guests can get on and off the bus at any of the numerous stops to explore specific areas at their own pace.

Three must-see attractions:

• The Space Needle: the most iconic visual in Seattle, guests can ride elevators 520 feet up for panoramic views of the cities.
• Chinatown-International District: guests can learn about the city's Asian-American roots and check out the Chinatown Gate.
• Pike Place Market: historic waterfront market with farmer's stalls and merchant booths

Audio and visual guide: in addition to the guides on the bus, a downloadable smartphone app provides images to match up with the tour audio.

Self-guided walking tour: the app also guides tourists through Pioneer Square with historical tidbits.

Keep your ticket: the hop-on, hop-off nature of the tour allows guests to take in sights at their own pace.