A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A winding path built in secret on the edge of the continent.

America's most famous piece of self-built architecture.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Elevated freight railway turned wildly successful urban park.

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

Try not to get slimed in Tribeca.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Dramatic river bend surrounds a natural red-rocked pedestal.

A 140-year-old castle with underground caves hidden in San Francisco.

These fantastically named natural pools look like something out of a Scottish myth.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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

Most-visited and most-photographed slot canyon in the American Southwest.

On Japan's Tashirojima Island, cats are king.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Once a purveyor of Santeria supplies, religious products , and household sundries, now closed.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

The art and history of the velvet painting are on full display in this Los Angeles museum.