An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

This collection of 20th-century toys is filled with a lifelong personal toy collection brought from the U.S. to Amsterdam.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This cheese shop also houses a museum devoted to Dutch dairy.

The attic of a four-century-old canal house hides a clandestine church.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

Surrounded by a smudge of dark earth, this isolated volcano sits in stark contrast to the surrounding Sahara.

The most remote tree in the world survived desertification, but not a drunk truck driver.

Camels and crocodiles share the black waters of this stunning Saharan oasis.

Crumbling pyramids and temple ruins stand within the shadow of this sacred butte.

All that remains of Jacques Cousteau's 1960s underwater "village."

These Nubian pyramids are strange and unique, even by pyramid standards.

HFH's slum simulation is either a noble recreation of poverty or a cringeworthy attempt at same.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

The first singer to cut a country music record is buried in a small graveyard in Atlanta, Georgia.

Oldest and rarest examples of telecommunication in the world.