A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

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

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

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

Op-art architecture designed for happiness.

Handsomely crafted representations of our round planet.

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

This former insane asylum now holds a pathological anatomy museum.

Macabre museum devoted to historical Viennese murders.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

A charming flea market shop dedicated to retrofuturistic apparati.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

An antique curios dealer and hybrid taxidermist.

Weird wax anatomical models reside here, as do other anatomical specimens.

The largest medical and anatomical collection in France lies hidden from the public.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.