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

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

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

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

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.

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

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

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

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

These "anatomical machines" are only one of the many strange items in this Italian crypt.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.

Crumbling necropolis set high above Fez.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Two small chapels housed inside an ancient tree.

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

The oldest stone house in Paris was built by its most famous alchemist.

The bears of Bern have been a city highlight for over 500 years.

This eclectic architectural gem played witness to Zurich’s colonial past.

Its vast collection of wondrous gadgets details the fascinating history of information technology.