Started as a kitchen garden, now the second largest botanical garden in the world.

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

London's amazing modernist public square that never was.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

Something's watching you.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A statue honors the children who fought Nazis in Poland.

The most visited, and possibly most controversial, museum in Germany.

This ancient theater was once the home of fierce gladiatorial battles.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

A national collection of Communist-era musical posters.

This Transylvanian church has changed its denomination four times.

Religious structure known for its sculpted details.

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."

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 medieval church built up to defend its village.

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

This bone-filled cave got its name after they found 140 bear skeletons inside.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

The cedar tree in Highgate Cemetery earned its title by accident.