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."

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

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This man-made mound monument was built out of soil from all across the Polish empire.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Art and a pun, all in one.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This lurid German fountain plots the sad course of marriage from dating to death.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

Tiny communists hammer away on the Olomouc Astronomical Clock.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

A surreal statue honoring Prague's favorite literary son.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.