We haven't done all of these things--but know they are all possibilities for fun activities to see the city or to understand a little more about the Pacific Northwest.
The region is also quite famous for microbreweries and wineries, but there are too many to mention! Some are downtown and others are a bit of a drive, but likely any of them would be an experience worth trying!
This waterfall is located just East of Portland. Take highway 84 for about 30 minutes and you'll come across this landmark.
Depending on the seasons, you'll find a beautiful assortment of roses in these gardens. Check the link for additional details.
There are 2 outlet malls in the Portland area--one just East of town (Troutdale) and the other South of town (Woodburn). If you feel like doing some tax-free shopping, check out either of these locations.

Swerve into the bike lanes to get an essential introduction to Oregon's largest city. Ride along the waterfront of Old Town, past buildings from the 19th and early 20th centuries, and then turn your handlebars downtown, along the Willamette River and through South Park Blocks.
Begin on 2nd Street and make your way to Tom McCall Waterfront Park, and then turn to Burnside to see Erickson's Saloon, established in 1895. See the Merchant Block in Japantown before rolling through the gates of Chinatown and into the Pearl District—viewing shops and restaurants like the Bridgeport Brewery and Nossa Familia Coffee Roasters. Ride through Jamison Square, past Powell's City of Books, Henry Weinhard's 140-year-old brewery, Zoobomb Bike Pile, and even the food carts at 9th and Alder.
South Park Blocks has been called Portland's "extended family room" and is seen by many as the heart of the city's cultural life. Pedal into this 12-block park, through Oregon's largest university—Portland State University—and then downhill, back toward the Willamette River, the lifeblood of the city. Ride downriver on paths free of cars, see the famous Hawthorne Bridge, and end right back where you started.

Set off on a fully guided Segway tour to see the best of Portland's beautiful waterfront area. Follow knowledgeable and charismatic tour guides to explore the Tom McCall Waterfront Park, the locally beloved Riverplace Marina, the historic government district, and more.
As your instructor briefs you on Segway safety and operations, get acquainted with the self-balancing 2-wheeler and prepare for your ride through the city. When you're ready, cruise alongside the picturesque Willamette River and learn about the creation of the scenic Tom McCall Waterfront Park.
Cross the historic Steel Bridge to reach the Vera Katz Eastbank Esplanade, a 1.5-mile-long (2.4 km) park lining the Willamette. Along the way, take the chance to learn about the city's vibrant culture and rich history from your guide.
Venture towards the Riverplace Marina, where you can marvel at the city's iconic skyline and waterfront landscape. Pass through the government district for a visit to the Portlandia statue, the second-largest copper statue in the United States after the Statue of Liberty.

Tour the best that Portland has to offer, exploring famous districts like Nob Hill, the Pearl district, the Cultural and Financial districts, before heading to Washington Park to wander through the beautiful rose gardens. See amazing views of the city and mountains with a ride on the Portland Aerial tram and explore the famous Lan Su Chinese Garden.
Start from downtown Portland and meander through the Cultural District, the Park Blocks, Portland State University, and the financial district. Check out the Tom McCall Waterfront Park on the Willamette River, home to numerous Portland festivals throughout the year including the Oregon Brewers Festival, the Waterfront Blues Festival, and the Bite of Oregon.
Take a ride on the famed Portland Aerial Tram, one of only 2 commuter aerial tramways in the U.S. The tram will sweep you from the South Waterfront district to the top of Marquam Hill (also known as Pill Hill), where you will you get amazing views of downtown Portland and the surrounding volcanic Cascade mountain range.
Swing by Pioneer Courthouse Square, also known as Portland's living room, and continue to Washington Park. This 400-acre urban park is home to the International Rose Test Gardens, the Japanese Gardens, the Hoyt Arboretum, the Oregon Zoo, and the World Forestry Center. When weather permits, stroll through the rose gardens, where you find over 7,000 rose bushes of over 550 varieties.
Continue to the Nob Hill (Northwest 23rd) district to check out Portland's happening restaurant scene, before delving into the famous Pearl District. Drive by Powell's book store, the largest independently owned book store in the world! The last stop on the tour will be to explore the magical Lan Su Chinese Garden, before making your way back into downtown Portland.