This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This is Britain's one and only clock concealed in the pavement.

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

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

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

This preserved puppy was an adorable beacon of charity.

Despite the name, this ancient piece of crystal may not have been a lens at all.

This magnificently macabre shield shows the power of chivalrous love in medieval times.

An archway adorned with vulnerable flora and fauna.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

The world's longest continuously running show has played at this small West End theater since 1974.

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

The television series' iconic giant foot was borrowed from this classical painting.

A mysterious shape catches the eye in this 16th-century painting.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A living memorial to the trees London lost during the Great Storm of 1987.

An agreement meant to honor the Duke of Buckingham led to this unusually-named passageway near Charing Cross.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

Originally commissioned as a sculpture to reflect the history of Belfast's red-light district, the final sculpture has been banned from Belfast public land.

It was once nicknamed "the most bombed hotel in Europe."

The only monument to name all of the passengers and crew who died on the RMS Titanic.

The last Victorian market in Belfast.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.