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

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

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

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

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.

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

Cat art as far as the eye can see.

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.

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

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

In the fictional world of Kcymaerxthaere, standing at this site just outside Vienna, Austria, the sky would have been found beneath your feet.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Legends surround an ancient tree trunk riddled with nails for good luck.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The topiary maze at the Habsburg hunting lodge.

This former insane asylum now holds a pathological anatomy museum.

Macabre museum devoted to historical Viennese murders.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.