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

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

Museum dedicated to the terror regimes of Hungary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This massive underground salt mine now holds a sci-fi theme park in its depths.

2300-year-old Roman road connecting the empire.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

This bridge was constructed from the rubble of the infamous Bastille.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

This banal Parisian entranceway is not what it seems.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.