A completely round house designed for the Atomic Age.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

The hollow trunk of this 650-year-old tree was used as a hideout by two Jewish brothers during World War II.

The largest retailer of seashells in the world.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

One family's mission to exemplify sustainability took on a whole new life as a surprisingly beautiful home.

The library's graceful rotunda is like a bibliophile's temple.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

The walls of the iconic dome are hollow and have a secret stairway.

The multinational Burger King chain is banned from operating within 20 miles of a family restaurant filed under the same name.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

This Old Testament garden features 100 plants from biblical times.

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

Children's playground hidden under a big pink and blue cap.