There are 25 scenic byways here in Washington, each with its own unique scenery and discoveries. And while they’re all worthy of praise (and all worth exploring), there’s one in particular that is a highly underrated treasure — especially if you’re into geology.

The Coulee Corridor National Scenic Byway (map here) spans about 150 miles, and you’ll want to allow half a day to enjoy it to the fullest.

The Coulee Corridor Scenic Byway runs from Omak to Othello, although you can drive it in either direction.

Ki0ki / TripAdvisor

The word “coulee” refers to the dry canyons that were once carved out by the Missoula Floods that hit this area at the end of the last ice age.

Ki0ki / TripAdvisor That’s why this area is so enjoyable for geography lovers and history buffs alike.

There are plenty of places to stop along the way – but even if you drive it straight through, you’ll still have quite the view.

Ki0ki / TripAdvisor And if you’re lucky enough to go on a day with light traffic, you’ll feel like you’re in your own world.

One of the major highlights of the byway is, of course, the magnificent Grand Coulee Dam.

WSDOT / Flickr At 550 feet high, this is the largest concrete structure and the largest hydroelectric facility in the country.

You’ll pass several state parks and recreation areas as you drive along, such as Steamboat Rock State Park and Dry Falls State Park.

Skwiki / TripAdvisor If you have a Discover Pass, you can stop and check them out.

As you cruise by Soap Lake, look for the sundial and sculpture known as Calling the Healing Waters.

RaymondSoapLake / TripAdvisor Designed by local artists David Govedere and Keith Powell, it pays homage to the healing powers of Soap Lake’s water and reflects the cultural and historical characteristics of the region.

The Coulee Corridor is divided into two parts, the north section and the south section.

Skwiki / TripAdvisor Of course, we highly recommend driving the entire stretch.

Have you ever cruised down the Coulee Corridor? What are your favorite stops?

Ki0ki / TripAdvisor

That’s why this area is so enjoyable for geography lovers and history buffs alike.

And if you’re lucky enough to go on a day with light traffic, you’ll feel like you’re in your own world.

WSDOT / Flickr

At 550 feet high, this is the largest concrete structure and the largest hydroelectric facility in the country.

Skwiki / TripAdvisor

If you have a Discover Pass, you can stop and check them out.

RaymondSoapLake / TripAdvisor

Designed by local artists David Govedere and Keith Powell, it pays homage to the healing powers of Soap Lake’s water and reflects the cultural and historical characteristics of the region.

Of course, we highly recommend driving the entire stretch.

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Address: Omak, WA, USAAddress: Coulee City, WA 99115, USAAddress: Moses Lake, WA 98837, USA