A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

These barriers stand as stark reminders of Northern Ireland's troubled past.

A museum marks and documents the site of the Titanic's launch.

A six-ton wedding present for the King of the Scots.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The most loyal of little dogs, or a Victorian era publicity stunt?

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Protecting the dead from opportunistic body snatchers.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The sculpture shows a water rat turning the world upside-down, landing an elephant on its head.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Go inside to really appreciate this 500-year-old technological masterpiece.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

Australia's largest collection of rare and bizarre insects.

A giant Australian fruit and tropical farm.

A wonder of natural limestone formations etched by millions of years of natural interaction between rainfall and rock and air.

Japan's largest collection of Western-style mansions in the port city of Kobe includes a recreation of Sherlock Holmes' 221B Baker Street quarters.