North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

Yo, Adrian!

The oldest farmer's market in America is so ancient it was approved by the King of England.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

This might just be the TARDIS of bookstores.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A museum dedicated to a Cold War era sausage.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Museum devoted to the artificial language of Esperanto.

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

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

Handsomely crafted representations of our round planet.

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

The beautiful baroque library of the Hapsburg empire.

An institution dedicated to curiosity, logic, riddles, and Mongolia's long history of puzzles.