No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

1513 Turkish world map, full of European state secrets and snarky commentary.

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

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A two-way chairlift system between Zugliget and the highest point in the city.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

This building has survived for more than a century and remains virtually untouched.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

The true meaning behind this sculpture remains unknown.

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

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

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

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

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Dine amidst exotic plants at this former royal greenhouse.

A gift from Emperor Franz Joseph I to his wife.

This museum is dedicated to the little known ancient Roman history of Vienna.

The Habsburgs' royal collections of art and wonders.

Op-art architecture designed for happiness.

Handsomely crafted representations of our round planet.

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

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.