The third tallest lighthouse in America once guided author Stephen Crane to safety.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

When ecosystems collide in the arid Southwest.

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

This spectacular track has run continuously since 1882.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

More than a century old, this trading post resides in the Navajo Nation.

This golf ball–shaped former desert real estate office now houses a UFO museum.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

Quite simply the largest tree in the world (by volume).

This hidden fire lookout offers spectacular views of Sequoia National Park.

The second-largest giant sequoia in the world.

Art Deco stylings conceal the true nature of this bridge.

This 19th-century museum inside of a lighthouse is only accessible during low tide.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

Lighthouse-cum-columbarium where "Nor'easters" and grandma go to die.

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

Fifty years after a “blast blasted blubber beyond all believable bounds,” this idyllic natural area commemorates the carnage.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

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