The world's smallest commercial theater is set up in what was once a urinal for Victorian men.

A replica of the steam engine that hauled Queen Victoria's Royal Train is on display at Windsor.

At just 51 feet and 10 inches long, it's the shortest street in England.

London's marvelous wildfowl reserve along the Thames.

London's Victorian Tower of Babel.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

This tribute to the fictional detective stands at the famous literary character's address.

The lasting remains of the Balloon Section of the British Armed Forces.

The final resting place of a miniature monkey.

A Welsh sheep farm provides daily (non-sheep) meals to red kites, producing dazzling displays of aerial acrobatics.

A turn-of-the-century prophecy comes true when a mischievous wooden Devil watches the neighboring church burn to the ground

Visit the last surviving outlet of a once popular chain of coffeeshops.

These 19th-century gas tanks were remade into an apartment complex.

A subterranean shelter remains intact under a busy Paris railway station.

What looks like a normal building is really a hollow facade hiding a subway vent.

This small, ingenious cannon once helped regulate Parisian life.

This massive library holds what was once the largest book collection in the world.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

For more than a century, Parisians have come for affordable dishes in a grand converted train station.

Claude Monet was baptized in this lavishly ornate Paris church.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.