22 days in United States Itinerary

Nicknamed the "Emerald City" because of its abundant evergreen trees, Seattle is the cultural and business center of the Pacific Northwest, as well as a popular holiday destination.

Explore the numerous day-trip ideas around Seattle: Tacoma (5 Mile Drive & Trails & Point Defiance Park). There's lots more to do: shop like a local with Chihuly Garden and Glass, learn about wildlife with up-close encounters at Woodland Park Zoo, take in panoramic vistas at Space Needle, and observe the fascinating underwater world at Seattle Aquarium.

To see other places to visit, maps, and more tourist information, you can read our Seattle travel route planner.

Brussels, Belgium to Seattle is an approximately 15-hour flight. Due to the time zone difference, you'll gain 9 hours traveling from Brussels to Seattle. Traveling from Brussels in August, things will get somewhat warmer in Seattle: highs are around 31°C and lows about 19°C. Cap off your sightseeing on the 18th (Wed) early enough to travel to Glacier National Park.

The glaciers from which Glacier National Park takes its name mostly dissipated eons ago, but they left behind a scoured landscape of high and steep mountain peaks, sparkling lakes, lush alpine meadows, and thick forests.

On the 20th (Fri), hike the day away at Highline Trail. The adventure continues: take in the dramatic natural features at Grinnell Glacier, appreciate the views at Logan Pass, hike along Iceberg Lake Trail, and take a memorable drive along Going-to-the-Sun Road.

For maps, traveler tips, photos, and tourist information, read our Glacier National Park trip planner.

You can fly from Seattle to Glacier National Park in 4.5 hours. Another option is to drive. The time zone difference moving from Pacific Standard Time (PST) to Mountain Standard Time (MST) is 1 hour. Traveling from Seattle in August, Glacier National Park is little chillier at night with lows of 10°C. Finish your sightseeing early on the 22nd (Sun) to allow enough time to drive to Yellowstone National Park.

An exceptionally diverse landscape and varied wildlife have made Yellowstone National Park one of America's most popular parks.

Yellowstone National Park is known for nature, wildlife, and historic sites. Your plan includes some of its best attractions: explore the stunning scenery at Grand Canyon of the Yellowstone, contemplate the waterfront views at Firehole River, explore the striking landscape at Lower Geyser Basin, and look for all kinds of wild species at Hayden Valley.

To see more things to do, reviews, traveler tips, and other tourist information, read our Yellowstone National Park road trip planner.

Getting from Glacier National Park to Yellowstone National Park by car takes about 8.5 hours. Other options: fly; or do a combination of car, bus, and taxi. In August, Yellowstone National Park is a bit cooler than Glacier National Park - with highs of 24°C and lows of 3°C. Cap off your sightseeing on the 29th (Sun) early enough to travel to Badlands National Park.

Although Badlands National Park's name might not be the most inviting, its landscape of pinnacles, eroded buttes, spires, and an expansive, pristine mixed-grass prairie remain enticing.

Start off your visit on the 30th (Mon): take in the dramatic natural features at White River Valley Overlook, explore the striking landscape at Big Badlands Overlook, explore the wealth of natural beauty at Bigfoot Pass Overlook, then take in the dramatic natural features at Yellow Mounds Overlook, then cruise along Loop Road, and finally take in the dramatic natural features at Badlands Wall.

To find reviews, photos, and tourist information, you can read our Badlands National Park online road trip planner.

Traveling by flight from Yellowstone National Park to Badlands National Park takes 8.5 hours. Alternatively, you can drive; or do a combination of car, shuttle, bus, and taxi. Prepare for somewhat warmer weather when traveling from Yellowstone National Park in August: high temperatures in Badlands National Park hover around 36°C and lows are around 17°C. Finish up your sightseeing early on the 31st (Tue) so you can go by car to Rocky Mountain National Park.

Rocky Mountain National Park presents an ideal setting for recreation in the mountain range for which the park is named.

Start off your visit on the 31st (Tue): take some stellar pictures from Milner Pass, admire all the interesting features of Trail Ridge Road, and then take in the spiritual surroundings of Chapel on the Rock.

For traveler tips, reviews, other places to visit, and other tourist information, go to the Rocky Mountain National Park driving holiday app.

Drive from Badlands National Park to Rocky Mountain National Park in 8 hours. Alternatively, you can do a combination of flight, bus, and car; or do a combination of taxi and bus. August in Rocky Mountain National Park sees daily highs of 37°C and lows of 15°C at night. On the 1st (Wed), you'll have the morning to explore before heading off to Denver.

Aptly nicknamed the "Mile-High City," Denver sits at an altitude of 1,600 m (5,280 ft) above sea level, located right where the Great Plains give way to the Rocky Mountains.

Kick off your visit on the 1st (Wed): get a new perspective on things with Boat Tours & Water Sports. On the 2nd (Thu), you'll have a packed day of sightseeing: discover the riches below the earth's surface at Capital Prize Gold Mine Tour, then take your sightseeing to a higher altitude at Mount Evans, and then head outdoors with Apex Ex.

To find photos, where to stay, traveler tips, and other tourist information, go to the Denver day trip planning site.

Getting from Rocky Mountain National Park to Denver by car takes about 2 hours. In September, plan for daily highs up to 30°C, and evening lows to 13°C. Finish your sightseeing early on the 4th (Sat) to allow enough time to travel back home.