When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

Walk the whole Mississippi River!

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The "Jade Museum" is full of thousands of intricately carved works of art made from various precious stones.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

Elvis's own personal tropical hideaway.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Allegedly haunted by Walt Disney himself, this inconspicuous lamp is always kept lit in his honor.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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.