On Japan's Tashirojima Island, cats are king.

A real-life replica of a home from Hayao Miyazaki's beloved movie "My Neighbor Totoro."

Japan's largest area of "pink moss" turns the hillside bright pink every spring.

The self-mummified monks of Japan.

This roadside stand claims to be the world's smallest bookstore.

An Industrial Revolution-era public work that purified water using nothing but sand.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

People escaping slavery may have hidden inside a corpse vault.

A derelict bit of transportation infrastructure hidden in the woods.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A wondrous old library overlooking the nation's capital.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A historic neighborhood church is reborn as a psychedelic arts collective.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

Easter in Westminster may be the only time and place to behold Edgar Allen Poe made entirely of Marshmallow Peeps.