A semi-scholarly approach to sex.

The world's largest collection of witchcraft regalia.

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

The ghostly remains of an accidental sea.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

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

A one-of-a-kind collection of a unique medium.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

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

A bizarre house filled with an astounding array of collections.

Hot springs monkey spa in the middle of Hell's Valley.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Dramatic river bend surrounds a natural red-rocked pedestal.

France's most famous cemetery, with some of its most curious tombs.

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

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

An emerald-green grotto just a short trip from Austin.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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