A beautifully eclectic mix of architectural styles.

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

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

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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

A floating cat sanctuary on an Amsterdam canal.

Cat art as far as the eye can see.

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

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

A beautifully detailed Victorian house designed to be easy to flee, built by a man haunted by fire.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

This peaceful gem in upstate New York was chosen as the future home of the 14th Dalai Lama's Library and Museum.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This abandoned church in central Lyon is missing its front stairs.

The leathery remains of a woman who died in the 13th century now lie in a church named for her.