The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A quiet rock and botanical garden is the beautiful centerpiece of Fort Lewis College.

A riverside tiny house with books and other treasures galore.

A hotel with a rich Wild West history of miners and bootleggers.

This spectacular track has run continuously since 1882.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

A massive sea stack famous for its appearance in The Goonies.

Home of Howard Hughes' Spruce Goose.

A Roman-style column in Oregon hides a spiral staircase inside.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

A giant Troll lurks under one of Seattle's oldest bridges.

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.