These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

World's largest porcine hairball sits in a collection maintained by Benedictine monks.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This hidden amusement park is a magical escape for kids and kids-at-heart.

A 60-room castle constructed by a horse-racing heir.

Originally built circa 13-14th century, this “snail well” was a resourceful means to draw water in a region where the soil was mostly loam.

One of only two remaining Victorian-era greenhouses in New York.

This innocent-looking townhome is actually a subway exit.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

A garden of massive sculptures sits in Jean Lindard's backyard.

Once known as one of the finest tourist railways in Europe.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

A celebration of once forgotten materials.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

This trail was once used to smuggle cigarettes, sugar, and other black market goods between Italy and Switzerland.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.