An unusually designed bridge from the 1920s was built to withstand the tides and winds of Maine.

The oldest stone house in Paris was built by its most famous alchemist.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A museum celebrating the self-taught artist-environment builder.

A bedazzled house and crown "jewel" of outsider artist Loy Allen Bowlin.

A marvel of Byzantine engineering under the streets of Istanbul.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

This pebble beach is so beautiful that taking its rocks is against the law.

When waves crash onto this section of beach, the rocks sing a song.

The "first cat," "first dog," and even a presidential pygmy hippo all get their due in this museum.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

Ancient barriers wrap around what was once an important stop along the Silk Road.

A swath of France so devastated by war it is still forbidden to go there.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Community bookshelf of 25-foot-tall book spines.

European castle ruins in an American state park are actually the product of death and grief.

A bronze ballot box stands at the spot where Susan B. Anthony voted illegally.

"Call for the doctor, call for the nurse... Vote!! said the lady with the alligator purse."

The floor-to-ceiling collection in an old factory is a unique alternative to stuffy galleries.

A room hidden behind a swinging shelf in the children's section.

The gravestone of the suffragist leader attracted extra visitors during the 2016 election.

Explore the evolution of printing technology, from cuneiform to Kindle.