Scattered throughout London are ancient remnants of the city's former bounding wall.

Hear the quietest sound from across the dome.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Baroque celebration of the end of the Great Plague of Vienna.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

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

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

A battle between nature and architecture in the Cambodian jungle.

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.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

The most confusing clock in New York.

The "Seinfeld" diner.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

The oldest surviving synagogue in New York City is now a soaring art space.

A legendary speakeasy bookstore returns from the brink.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.