This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

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

Conspiracy theories and occult legends surround this mysterious natural rock formation.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

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

This snug medieval lane is one of the narrowest streets in the world.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

It's good luck to be mocked by this monkey.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

An oversized, oddly designed pedestrian overpass has drawn comparisons to a commode for pachyderms.

This "floating railway" is one of the world's oldest monorail systems.

This futuristic German television spire is actually the world's largest digital clock.

Twisted buildings adorn the banks of the Rhine river.

Largest illuminated advertisement sign in the world.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Thousands of flowers create enchanting pink tunnels over the city streets.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

100 massive sculptures in the Hudson River Valley.

Three acres of mythology-inspired sculptures are visible from the highway.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

The Hudson River School comes alive at this palatial estate.