A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Largest display of Wesleyana anywhere in the world.

One person's lost luggage is another person's treasure.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Prove you deserve to be fed by Kenny Shopsin.

Slyly buy a shake in the Parker Meridien lobby.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A dilapidated dock tells the story of Titanic's missed arrival.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A celebrity from the late Cretaceous period.

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

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

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

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

This charming railway is one of the oldest and steepest funiculars in England.

This Great Depression-era creation was once known as the strangest house in the world.

A sculpture of a salmon swimming through a brick building.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.