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.

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

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A Jenga-style cylindrical tower of books that appears to go on forever.

Macabre astrological automaton clock dating to the late 1400s.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

Home to a vast and influential collection of Shakespeareana.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

The national park was once a plantation estate.

The oldest continuously operating fish market in the United States.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

A wondrous old library overlooking the nation's capital.

Home to items never before seen by the public.