Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The longest-covered bridge in the state of Maryland.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

This museum is dedicated to a Hollywood icon.

A collection of unique outdoor sculptures surounded by the beauty of nature.

A forsaken wonder in the middle of the East Side neighborhood.

Its original statue was deemed so ugly, locals called it “Scary Lucy.”

An abandoned tuberculosis hospital moulders on into an uncertain future.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

This restored house is like a time capsule of the president's unconventional inauguration.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

The Wright Tavern is possibly the most important building in Concord Massachusetts to the American Revolution.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

This historic national park is covered in the stunning ruins of red rock pueblos.

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